SAMBA Vuln Could Be Dangerous

If you are not already looking at the newest SAMBA issue, you should be paying attention. It is a stack-based buffer overflow, exploitable remotely without credentials. The MetaSploit folks are already hard at work on an exploit and some versions are rumored to be floating about the underground.

The vulnerability exists in OS X, Linux and a variety of appliance platforms using the core SAMBA code. Updates are starting to roll into the primary distributions and OS images. Ubuntu, for example, already has a fixed version available.

You can read the SAMBA folks release here for more information.

Likely, wide scale exploitation is on the horizon and malware/worm development is also predicted for this particular issue.

In terms of actions, begin to understand where SAMBA is used in your environment, reduce your attack surfaces as much as possible, implement the patches where available and increase your vigilance on SAMBA utilizing systems/processes.

Keep your eyes on this one. With this also being a fairly heavy/serious Microsoft patch day, your security team and admins might be focused on other things. You don’t want this one to slip through the cracks.

A Plethora of New Issues for Today

It’s been a busy morning for vulnerabilities so far. We are tracking new vulnerabilities in the following applications:

Squid Proxy – a DoS problem has been identified in the ICAP implementation that could allow attackers to spike the CPU of the server, a patch is available and should be applied on your next maintenance process

Samba – A buffer overflow in Samba version 3.0.27a allows remote execution of code if the “domain logons” option is enabled, patches are available on the Samba site for the problem.

WordPress – A SQL injection has been found in the charset implementation. Dumping the database is possible and when combined with other exploits already available can allow remote compromise of the WordPress Admin password. There is a workaround, but it is very specific to each WordPress deployment, so check the WordPress site carefully for info on this issue.

We are also tracking a few new tools of interest, that might increase some of the scan and probe traffic over the next few weeks while attackers play with their new toys. They are:

HttpRecon – a tool for advanced web server fingerprinting, likely to increase web server probes as the tool is examined and included into other tools

BurpSuite – a new revision of this tool for testing websites for things like SQL injection and XSS is now available, likely to cause scans for web application problems

EchoVNC – a firewall, proxy and network access control avoidance enabled version of the VNC server has been released, this is likely to be a useful tool for attackers and bot-masters as they compromise networks

Lastly, Microsoft is releasing a large load of patches today. Amongst them are 3 remotely exploitable “critical” patches. Look for exploits and such to follow very quickly if they are not already available. Wide scale exploit distribution and inclusion into bot-net clients is likely to follow in the next few days. As always, patches should be tested and applied as soon as possible.