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Fencer Intel
high 7.5

CVE-2019-15961 json

Clam AntiVirus (ClamAV) Software Email Parsing Vulnerability

published 6y ago modified 4mo ago also EUVD-2019-6858

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.1%
EPSS 3.1% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

A vulnerability in the email parsing module Clam AntiVirus (ClamAV) Software versions 0.102.0, 0.101.4 and prior could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to inefficient MIME parsing routines that result in extremely long scan times of specially formatted email files. An attacker could exploit this vulnerability by sending a crafted email file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process to scan the crafted email file indefinitely, resulting in a denial of service condition.

Patch / fix

  • ClamAV ClamAV 0.101.4
  • clamav Debian 14, Debian 13, Debian 12 0.102.1+dfsg-1

debian advisories DEBIAN-CVE-2019-15961

  • clamav Ubuntu 16.04 LTS 0.102.1+dfsg-0ubuntu0.16.04.2
  • clamav Ubuntu 18.04 LTS 0.102.1+dfsg-0ubuntu0.18.04.2
  • clamav Ubuntu Pro 14.04 LTS 0.102.1+dfsg-0ubuntu0.14.04.1+esm1

ubuntu advisories UBUNTU-CVE-2019-15961

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 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
  • clamav SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 0.100.3-0.20.29.1
  • clamav SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +13 more 0.100.3-33.29.1
  • clamav SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 0.100.3-3.17.2

suse advisories SUSE-SU-2020:3918-1SUSE-SU-2020:3790-1SUSE-SU-2020:3729-1SUSE-SU-2019:14236-1SUSE-SU-2019:3177-1SUSE-SU-2019:3176-1

  • 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
  • clamav openSUSE Leap 15.1 0.100.3-lp151.2.6.1

opensuse advisories openSUSE-SU-2024:10685-1openSUSE-SU-2020:2276-1openSUSE-SU-2020:2268-1openSUSE-SU-2019:2668-1

  • clamav Alpine 3.10 0.100.5-r0
  • clamav Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 0.102.0-r0

alpine advisories ALPINE-CVE-2019-15961

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

Is CVE-2019-15961 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2019-15961 updated cvss 7.5

clamav: long scanning time of specially crafted email file leads to denial of service

  • 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
last yr.

Exploit prediction

3.14% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.clamav.net https://bugzilla.clamav.net/show_bug.cgi?id=12380 referenced PoC, tagged "exploit" by a source, unverified

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 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

  • ClamAV ClamAV

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel 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.