CVE-2017-6420
medium
CVSS v3
5.5
CVSS v4 NEW
—
VIR risk
5.5
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.
Predictions
Exploit likelihood
55%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 0.99.3-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 0.99.3~beta1+dfsg-1 |
| debian | bullseye | fixed | 0.99.3~beta1+dfsg-1 |
| debian | forky | fixed | 0.99.3~beta1+dfsg-1 |
| debian | sid | fixed | 0.99.3~beta1+dfsg-1 |
| debian | trixie | fixed | 0.99.3~beta1+dfsg-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| clamav | clamav | 0.99.2 | |
References
- https://security.archlinux.org/ASA-201802-1
- 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
- https://security.gentoo.org/glsa/201804-16
- https://www.suse.com/security/cve/CVE-2017-6420.html
- https://security-tracker.debian.org/tracker/CVE-2017-6420
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.