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.
{
"cpes": [
"cpe:2.3:a:apache:apr-util:*:*:*:*:*:*:*:*"
],
"severity": "High"
}