Input validation error in SpamAssassin - CVE-2019-12420

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Main Vulnerability Database Vulnerabilities #VU23600

Input validation error in SpamAssassin - CVE-2019-12420

Published: December 13, 2019


Vulnerability identifier: #VU23600
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-12420
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when parsing multipart email messages. A remote attacker can send a specially crafted email message and consume all available resources on the system.


Affected software

SpamAssassin
Amazon Linux AMI
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE CaaS Platform
SUSE Enterprise Storage
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
SUSE OpenStack Cloud Crowbar
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
HPE Helion Openstack
SUSE OpenStack Cloud
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Development Tools
SUSE Linux Enterprise Module for Basesystem
spamassassin (Alpine package)
spamassassin (Debian package)
spamassassin (Red Hat package)
spamassassin (Ubuntu package)
perl-Mail-SpamAssassin-Plugin-iXhash2
perl-Mail-SpamAssassin
spamassassin
spamassassin-debuginfo
spamassassin-debugsource

How to mitigate CVE-2019-12420

Install updates from vendor's website.

SpamAssassin - update to 3.4.3
spamassassin (Alpine package) - update to 3.4.3-r0
spamassassin (Debian package) - addressed in versions 3.4.2-1+deb10u1, 3.4.2-1~deb9u2
spamassassin (Red Hat package) - addressed in versions 3.4.0-6.el7, 3.4.2-10.el8
spamassassin (Ubuntu package) - addressed in versions 3.4.2-0ubuntu0.16.04.2, 3.4.2-0ubuntu0.18.04.2, 3.4.2-1ubuntu0.19.04.1, 3.4.2-1ubuntu0.19.10.1
perl-Mail-SpamAssassin-Plugin-iXhash2 - addressed in versions 2.05-7.14.1, 2.05-12.10.1
perl-Mail-SpamAssassin - addressed in versions 3.4.5-7.14.1, 3.4.5-12.10.1, 3.4.5-44.13.1
spamassassin - addressed in versions 3.4.5-7.14.1, 3.4.5-12.10.1, 3.4.5-44.13.1
spamassassin-debuginfo - addressed in versions 3.4.5-7.14.1, 3.4.5-12.10.1, 3.4.5-44.13.1
spamassassin-debugsource - addressed in versions 3.4.5-7.14.1, 3.4.5-12.10.1, 3.4.5-44.13.1

External References

Related Security Bulletins