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 products
apache: apr-util
References2
- lists.apache.org/thread/2v8o3bj9pb7lfcr57bdnjg9xfkj04mg5 Mailing ListVendor Advisory
- www.openwall.com/lists/oss-security/2026/08/06/8 Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 32 · as of 12 November 2026
- CWE
- CWE-208
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