CVE-2025-5372
Medium
Description
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.
SeverityMedium
CVSS5.0
Exploit probability—
Product
Libssh
PublishedJul 4, 2025
First seenJul 4, 2025
Weakness typeCWE-682CWE-682
How to fix
Update
- libssh libssh0.11.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libssh libssh | v < 0.11.2 | 0.11.2 |
| redhat openshift_container_platform | 4.0 | — |
| redhat enterprise_linux | 6.0, 7.0, 8.0, 9.0, 10.0 | — |
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