CVE-2023-2283
MEDIUM 6.5EPSS 1.1%
A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.
- Affected
- libssh
- CVSS v3.1 NVD
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS
- 1.06% chance of exploitation in the next 30 days, 64th percentile
- Published
- 2023-05-26
- Updated
- 2025-11-03
Exploit collections (1)
- libssh/pubkey-auth-bypass-CVE-2023-2283github/securitylab
Security advisories
- https://www.libssh.org/security/advisories/CVE-2023-2283.txt
- https://access.redhat.com/security/cve/CVE-2023-2283
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736