Allocation of Resources Without Limits or Throttling Affecting dovecot-mysql package, versions <1:2.3.16-6.el8_10


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-RHEL8-DOVECOTMYSQL-7757747
  • published21 Aug 2024
  • disclosed15 Aug 2024

Introduced: 15 Aug 2024

CVE-2024-23184  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade RHEL:8 dovecot-mysql to version 1:2.3.16-6.el8_10 or higher.
This issue was patched in RHSA-2024:6973.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dovecot-mysql package and not the dovecot-mysql package as distributed by RHEL. See How to fix? for RHEL:8 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