ZOO archive issues hit security vendors

Posted by   Virus Bulletin on   May 9, 2007

Errors handling rare format patched by four AV and anti-spam products.

A researcher has revealed details of flawed implementation of a somewhat archaic archive format, .zoo, which has required patching in several anti-virus products and a popular anti-spam appliance, and also affects some archiving software.

Products from Avira, Alwil and Panda were all patched in late March and early April, as was the Barracuda Spam Firewall, after the vendors were informed of the infinite-loop issue by the researcher, Jean-Sebastien Guay-Leroux. In some cases exploitation of the flaw could have been used to cause extremely high processor usage or even denial of service in the security software, leaving systems vulnerable to further attack or blocking mail transfer on affected SMTP servers.

The flaw was first discovered in September last year, and all affected vendors were informed by March 19th. The last vendor to apply a patch, Alwil, released its fix in mid-April, and the vulnerability is being made public despite remaining issues with two archivers, PicoZip and WinAce, which are both affected by the flaw but whose makers have yet to respond to the researcher.

Most users of the affected products should be automatically protected by recent updates, but users are advised to check that they are running the latest versions of their security software at all times to ensure the best possible protection. More details of the flaws, including proof-of-concept exploit code, can be found at the researcher's site, here.

Trend Micro, troubled by a string of vulnerabilities in recent months, has also released details of two more buffer-overflow issues, which are thought to be exploitable only from the local system. Trend's patch releases covering the issues are here, advisories from the Zero Day Initiative are here and here, and a Secunia alert is here.

Posted on 09 May 2007 by Virus Bulletin

twitter.png
fb.png
linkedin.png
hackernews.png
reddit.png

 

Latest posts:

VB2018 paper: The modality of mortality in domain names

Domains play a crucial role in most cyber attacks, from the very advanced to the very mundane. Today, we publish a VB2018 paper by Paul Vixie (Farsight Security) who undertook the first systematic study into the lifetimes of newly registered domains.…

VB2018 paper: Analysing compiled binaries using logic

Constraint programming is a lesser-known technique that is becoming increasingly popular among malware analysts. In a paper presented at VB2018 Thaís Moreira Hamasaki presented an overview of the technique and explained how it can be applied to the…

Virus Bulletin encourages experienced speakers and newcomers alike to submit proposals for VB2019

With a little less than a month before the deadline of the call for papers for VB2019, Virus Bulletin encourages submissions from experienced speakers and newcomers alike.

VB2018 paper: Internet balkanization: why are we raising borders online?

At VB2018 in Montreal, Ixia researcher Stefan Tanase presented a thought-provoking paper on the current state of the Internet and the worrying tendency towards raising borders and restricting the flow of information. Today we publish both his paper…

The malspam security products miss: banking and email phishing, Emotet and Bushaloader

The set-up of the VBSpam test lab gives us a unique insight into the kinds of emails that are more likely to bypass email filters. This week we look at the malspam that was missed: banking and email phishing, Emotet and Bushaloader.

We have placed cookies on your device in order to improve the functionality of this site, as outlined in our cookies policy. However, you may delete and block all cookies from this site and your use of the site will be unaffected. By continuing to browse this site, you are agreeing to Virus Bulletin's use of data as outlined in our privacy policy.