Use After Free Affecting clamav package, versions <0.99.2+dfsg-6+deb9u1
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.
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Test your applications- Snyk IDSNYK-DEBIAN9-CLAMAV-372403
- published7 Aug 2017
- disclosed7 Aug 2017
Introduced: 7 Aug 2017
CVE-2017-6420 (opens in a new tab)How to fix?
Upgrade Debian:9 clamav to version 0.99.2+dfsg-6+deb9u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream clamav package and not the clamav package as distributed by Debian.
See How to fix? for Debian:9 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
- https://security-tracker.debian.org/tracker/CVE-2017-6420
- https://security.gentoo.org/glsa/201804-16
- https://github.com/vrtadmin/clamav-devel/commit/dfc00cd3301a42b571454b51a6102eecf58407bc
- 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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-6420