CVE-2017-6420

Published: Aug 7, 2017Modified: May 13, 2026

5.5

Vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploitability: 1.8 / Impact: 3.6

Source: NVD

Description

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.

Affected (1)

Products: Clamav: Clamav

Clamav

1 product

Clamav

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Clamav Clamav	Version 0.99.2

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (8)

https://bugzilla.clamav.net/show_bug.cgi?id=11798

Source: cve@mitre.org

Permissions Required

https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/use-after-free/clamav-use-after-free-pe.md

Source: cve@mitre.org

Third Party Advisory

https://github.com/vrtadmin/clamav-devel/commit/dfc00cd3301a42b571454b51a6102eecf58407bc

Source: cve@mitre.org

Issue TrackingPatchThird Party Advisory

https://security.gentoo.org/glsa/201804-16

Source: cve@mitre.org

https://bugzilla.clamav.net/show_bug.cgi?id=11798

Source: af854a3a-2127-422b-91ae-364da2661108

Permissions Required

https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/use-after-free/clamav-use-after-free-pe.md

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://github.com/vrtadmin/clamav-devel/commit/dfc00cd3301a42b571454b51a6102eecf58407bc

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingPatchThird Party Advisory

https://security.gentoo.org/glsa/201804-16

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.