Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| n/a / libssh | affected libssh-2 |
CWE
CWE-287
References
- https://access.redhat.com/security/cve/CVE-2023-2283
- https://www.libssh.org/security/advisories/CVE-2023-2283.txt
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/
- http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html
- https://security.gentoo.org/glsa/202312-05
- https://security.netapp.com/advisory/ntap-20240201-0005/
ADP enrichment
No English description supplied.
- https://access.redhat.com/security/cve/CVE-2023-2283
- https://www.libssh.org/security/advisories/CVE-2023-2283.txt
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/
- http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html
- https://security.gentoo.org/glsa/202312-05
- https://security.netapp.com/advisory/ntap-20240201-0005/
- http://seclists.org/fulldisclosure/2025/Feb/18