Description
A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password verification function uses standard memcmp() for comparing password hashes instead of a constant-time comparison function. A remote attacker could potentially use timing measurements of LDAP bind attempts to infer partial hash information, though practical exploitation is extremely difficult due to PBKDF2 computational overhead.
Problem types
Product status
Timeline
| 2026-07-08: | Reported to Red Hat. |
| 2026-07-08: | Made public. |
Credits
Red Hat would like to thank Andrew Rukin (Arenadata) for reporting this issue.
References
access.redhat.com/security/cve/CVE-2026-15041
bugzilla.redhat.com/show_bug.cgi?id=2498022 (RHBZ#2498022)