CVE-2025-5372
Libssh: incorrect return code handling in ssh_kdf() in libssh
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Libssh: incorrect return code handling in ssh_kdf() in libssh
A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.
Reserved 2025-05-30 | Published 2025-07-04 | Updated 2025-07-04 | Assigner redhat| 2025-05-30: | Reported to Red Hat. |
| 2025-06-24: | Made public. |
access.redhat.com/security/cve/CVE-2025-5372
bugzilla.redhat.com/show_bug.cgi?id=2369388 (RHBZ#2369388)
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