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Fencer Vulns
high 7.5

CVE-2020-3341 json

ClamAV PDF Parsing Denial of Service Vulnerability

published 2020-05-13 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-24612

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

A vulnerability in the PDF archive parsing module in Clam AntiVirus (ClamAV) Software versions 0.101 - 0.102.2 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to a stack buffer overflow read. An attacker could exploit this vulnerability by sending a crafted PDF file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.

Patch / fix

  • Cisco ClamAV 0.102.3
  • clamav Debian 14, Debian 13, Debian 12 0.102.3+dfsg-1

debian advisories DEBIAN-CVE-2020-3341

  • clamav Ubuntu 16.04 LTS 0.102.3+dfsg-0ubuntu0.16.04.1
  • clamav Ubuntu 18.04 LTS 0.102.3+dfsg-0ubuntu0.18.04.1
  • clamav Ubuntu 20.04 LTS 0.102.3+dfsg-0ubuntu0.20.04.1
  • clamav Ubuntu Pro 14.04 LTS 0.102.3+dfsg-0ubuntu0.14.04.1+esm1

ubuntu advisories UBUNTU-CVE-2020-3341

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • clamav SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 0.103.0-0.20.32.1
  • clamav SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +12 more 0.103.0-33.32.1
  • clamav SLE Module for Basesystem 15 SP2, SLE Module for Basesystem 15 SP1 0.103.0-3.23.1
  • clamav SLES for SAP 12 SP5, SLES 12 SP5 0.103.0-3.3.1

suse advisories SUSE-SU-2021:14592-1SUSE-SU-2020:3918-1SUSE-SU-2020:3790-1SUSE-SU-2020:3729-1

  • clamav openSUSE Tumbleweed 0.103.3-1.4
  • clamav openSUSE Leap 15.2 0.103.0-lp152.6.3.1
  • clamav openSUSE Leap 15.1 0.103.0-lp151.2.12.1

opensuse advisories openSUSE-SU-2024:10685-1openSUSE-SU-2020:2276-1openSUSE-SU-2020:2268-1

  • clamav Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 0.102.3-r0

alpine advisories ALPINE-CVE-2020-3341

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-3341 updated cvss 7.5

clamav: stack-based buffer overflow via a crafted PDF file

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

3.45% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Cisco ClamAV

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.