5.5

CVE-2017-6420: clamav Use After Free

CVSS: 5.5v3.0MediumModified
AliasesUBUNTU-CVE-2017-6420DEBIAN-CVE-2017-6420
Published 07-08-2017Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2017-6420 is a medium (CVSS 5.5) Use After Free vulnerability in clamav. EPSS estimates a 1.38% chance of exploitation in the next 30 days, higher than 71.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.0 (NVD)
EPSS score
1.38%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 4
DLA-1105-1DLA-1261-1MGASA-2017-0291OPENSUSE-SU-2024:10685-1SUSE-SU-2018:0254-1SUSE-SU-2018:0255-1

Timeline

  1. 07-08-2017
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.38%

Chance of exploitation in the next 30 days

Percentile

72%

Versus all other CVEs

30-day change

0.00 pp

From 1.38% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Clamav1 product
Debian1 product
  • clamav< 0.99.3~beta1+dfsg-1
Ubuntu1 product
  • clamav< 0.99.2+addedllvm-0ubuntu0.14.04.2 | < 0.99.2+dfsg-0ubuntu0.16.04.2

3 vendors · 3 products

References

9 links