Information Exposure Affecting apr-util package, versions <1.6.1-4ubuntu2.2+esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.38% (31st percentile)

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  • Snyk IDSNYK-UBUNTU2004-APRUTIL-18584753
  • published3 Sept 2026
  • disclosed6 Aug 2026

Introduced: 6 Aug 2026

CVE-2025-49506  (opens in a new tab)
CWE-208  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 apr-util to version 1.6.1-4ubuntu2.2+esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apr-util package and not the apr-util package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack particularly on platforms without crypt() such as  Windows, BeOS, NetWare, or Android.

Users are recommended to upgrade to version 1.6.4, which fixes this issue.

CVSS Base Scores

version 3.1