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Message-ID: <e9d0c047-bcbc-09d8-b16e-d48e9cba4af5@apache.org>
Date: Thu, 06 Aug 2026 14:04:32 +0000
From: Eric Covener <covener@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2025-49506: Apache Portable Runtime Utility:
apr_password_validate() vulnerable to timing attack
Severity: low
Affected versions:
- Apache Portable Runtime Utility (APR-util) 1.2.0 through 1.6.3
Description:
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.
Credit:
Michael Rowley <michael csirt.global> (finder)
References:
https://apr.apache.org/
https://www.cve.org/CVERecord?id=CVE-2025-49506
Timeline:
2024-06-03: Reported to security team
2026-08-06: fixed in 1.6.x by r1936805
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