Bug 2512077 (CVE-2025-49506)

Summary: CVE-2025-49506 apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password validation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: kshier, rhel-process-autobot, stcannon, teagle, watson-tool-maintainers, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Apache Portable Runtime Utility (apr-util). The `apr_password_validate()` function does not perform constant-time comparisons for hashes or passwords. This vulnerability allows a remote attacker to conduct a timing attack, particularly on platforms without `crypt()` such as Windows, BeOS, NetWare, or Android. By observing the time differences in comparisons, an attacker could potentially deduce the content of sensitive information like password hashes.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2513917    
Bug Blocks:    

Description OSIDB Bzimport 2026-08-06 14:41:46 UTC
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.