Use After Free Affecting clamav-filesystem package, versions <0:0.99.3-1.28.amzn1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-AMZN201803-CLAMAVFILESYSTEM-1711380
- published27 Sept 2021
- disclosed7 Aug 2017
Introduced: 7 Aug 2017
CVE-2017-6420 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 clamav-filesystem to version 0:0.99.3-1.28.amzn1 or higher.
This issue was patched in ALAS-2018-958.
NVD Description
Note: Versions mentioned in the description apply only to the upstream clamav-filesystem package and not the clamav-filesystem package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.
The wwunpack function in libclamav/wwunpack.c in ClamAV 0.99.2 allows remote attackers to cause a denial of service (use-after-free) via a crafted PE file with WWPack compression.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6420
- https://security.gentoo.org/glsa/201804-16
- https://bugzilla.clamav.net/show_bug.cgi?id=11798
- https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/use-after-free/clamav-use-after-free-pe.md
- https://github.com/vrtadmin/clamav-devel/commit/dfc00cd3301a42b571454b51a6102eecf58407bc