CVE-2025-49506: CWE-208 Observable Timing Discrepancy in Apache Software Foundation Apache Portable Runtime Utility
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.
AI Analysis
Technical Summary
The Apache Portable Runtime Utility (APR-util) versions 1.6.3 and earlier contain a timing side-channel vulnerability (CWE-208) in the apr_password_validate() function. The function does not execute password or hash comparisons in constant time, which can leak sensitive information through observable timing differences. This flaw is particularly relevant on platforms lacking the crypt() function, including Windows, BeOS, NetWare, and Android. Users are advised to upgrade to APR-util version 1.6.4, where this issue has been addressed.
Potential Impact
An attacker able to measure the time taken by apr_password_validate() could potentially infer password or hash values due to timing discrepancies. This could lead to partial disclosure of sensitive authentication data on affected platforms. However, no known exploits are reported in the wild.
Mitigation Recommendations
Users should upgrade to Apache Portable Runtime Utility version 1.6.4, which fixes the timing discrepancy issue in apr_password_validate(). No other mitigations are indicated.
CVE-2025-49506: CWE-208 Observable Timing Discrepancy in Apache Software Foundation Apache Portable Runtime Utility
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.
Affected software
pkg:maven/org.apache.apr/apr-utilRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Apache Portable Runtime Utility (APR-util) versions 1.6.3 and earlier contain a timing side-channel vulnerability (CWE-208) in the apr_password_validate() function. The function does not execute password or hash comparisons in constant time, which can leak sensitive information through observable timing differences. This flaw is particularly relevant on platforms lacking the crypt() function, including Windows, BeOS, NetWare, and Android. Users are advised to upgrade to APR-util version 1.6.4, where this issue has been addressed.
Potential Impact
An attacker able to measure the time taken by apr_password_validate() could potentially infer password or hash values due to timing discrepancies. This could lead to partial disclosure of sensitive authentication data on affected platforms. However, no known exploits are reported in the wild.
Mitigation Recommendations
Users should upgrade to Apache Portable Runtime Utility version 1.6.4, which fixes the timing discrepancy issue in apr_password_validate(). No other mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2025-06-06T09:23:28.146Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a749d33bf8831d539db9d17
Added to database: 08/06/2026, 14:41:55 UTC
Last enriched: 08/06/2026, 16:14:41 UTC
Last updated: 08/06/2026, 22:13:04 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.