Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libssh | Libssh | >= 0.9.1, <= 0.9.6 |
| Fedoraproject | Fedora | 37 |
| Redhat | Enterprise Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_
- https://access.redhat.com/security/cve/CVE-2023-2283Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736Issue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202312-05
- https://security.netapp.com/advisory/ntap-20240201-0005/
- https://www.libssh.org/security/advisories/CVE-2023-2283.txtVendor Advisory
- http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_
- http://seclists.org/fulldisclosure/2025/Feb/18
- https://access.redhat.com/security/cve/CVE-2023-2283Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736Issue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202312-05
- https://security.netapp.com/advisory/ntap-20240201-0005/
- https://www.libssh.org/security/advisories/CVE-2023-2283.txtVendor Advisory
FAQ
What is CVE-2023-2283?
CVE-2023-2283 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ha...
How severe is CVE-2023-2283?
CVE-2023-2283 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-2283?
Check the references section above for vendor advisories and patch information. Affected products include: Libssh Libssh, Fedoraproject Fedora, Redhat Enterprise Linux.