Archive for the “Code Snippets” Category

Code snippets including custom code releases and modified GPL code to resolve issues or provide functionality.

Recently I wrote an article on cisco-ocs from Backtrack Linux and provided examples of what it did as well as a bug where if a higher privilege was provided to the vty ports it would note the router was not vulnerable. In that scenario the router was even more vulnerable because the initial login provides enable privileges. Anyhow fast forward five days and the developer, known by OverIP, reached out to me to get more details so he could fix the bug and discuss expanding Cisco OCS’s capabilities. I am happy to announce Cisco OCS version 0.2 which fixes the bug mentioned in the previous article. More details are provided below as well as information about possible future releases.

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I recently wrote an article about how to fix btscanner in Backtrack Linux and realized after the article was completed that some people may prefer to launch btscanner via the menu in Backtrack Linux instead of the command terminal by typing btscanner. This article specifically explains how to add btscanner back to the menu in Backtrack Linux under Backtrack > Information Gathering > Wireless Analysis > BlueTooth Analysis > btscanner. The information could however apply to any tools you wanted to manually add to the Backtrack menu by modifying each variable accordingly.

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When using the cisco-auditing-tool script located in the Backtrack Linux menu ( Backtrack > Vulnerability Assessment > Network Assessment > Cisco Tools ) I was getting an error even though I was sure one of the passwords I had in the wordlist was accurate. After some troubleshooting I was able to figure out that the script checked for a non-privileged account on the Cisco device but if the account was actually a privileged account which is also known as an enable account it would crash because it never received the response it expected. I added a couple lines of code and now the cisco-auditing-tool Perl script will provide confirmation of lower level accounts on a Cisco device as well as enable level accounts on a Cisco device. Below I describe the error message output when the cisco-auditing-tool Perl script was crashing followed by the code update to provide Cisco enable level password auditing.

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I take a lot of notes when I am either working on projects or researching so in Backtrack Linux I use KeepNote to accomplish this. KeepNote is a great little note application that provides notebook and tab functionality which pretty much covers what I need to do. One thing KeepNote doesn’t offer right out of the box is an easy way to backup notes from the command line so I took another backup shell script and converted it to backup KeepNote notes on Backtrack.

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The below code snippet was used to add SSH users to RackSpace cloud CentOS Linux nodes being used as application servers and managed via RightScale. The SSH users were required during a testing phase so they could look through logs and make modifications to specific configuration files, etc. There are three things that have to happen to create the SSH user, allow them to login, and provide them the necessary rights on the server to accomplish their tasks which include adding the user, modifying the sshd config to allow password logins, and update the sudoers file to enable sudo access for wheel group users.

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