CVE-2024-23184 Affecting dovecot package, versions <1:2.3.19.1+dfsg1-2.1+deb12u1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-DEBIAN12-DOVECOT-7687660
  • published16 Aug 2024
  • disclosed10 Sept 2024

Introduced: 16 Aug 2024

CVE-2024-23184  (opens in a new tab)

How to fix?

Upgrade Debian:12 dovecot to version 1:2.3.19.1+dfsg1-2.1+deb12u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dovecot package and not the dovecot package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors sending emails to a victim, this is a security issue. An external attacker can send specially crafted messages that consume target system resources and cause outage. One can implement restrictions on address headers on MTA component preceding Dovecot. No publicly available exploits are known.

CVSS Scores

version 3.1