CVEvulnerability
CVE-2023-2283
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2023-05-26
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-287
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.
Affected configurations
• libssh libssh (>= 0.9.1 <= 0.9.6)
• libssh libssh (>= 0.10.0 <= 0.10.4)
• fedoraproject fedora 37
• redhat enterprise linux 8.0
• redhat enterprise linux 9.0
Related
Weakness · CWE (1)
- CWE-287 Improper Authentication weakness
References
- http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html packetstormsecurity.com
- https://access.redhat.com/security/cve/CVE-2023-2283 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736 Issue Tracking, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202312-05 security.gentoo.org
- https://security.netapp.com/advisory/ntap-20240201-0005/ security.netapp.com
- https://www.libssh.org/security/advisories/CVE-2023-2283.txt Vendor Advisory
- http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html packetstormsecurity.com
- http://seclists.org/fulldisclosure/2025/Feb/18 seclists.org
- https://access.redhat.com/security/cve/CVE-2023-2283 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2189736 Issue Tracking, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202312-05 security.gentoo.org
- https://security.netapp.com/advisory/ntap-20240201-0005/ security.netapp.com
- https://www.libssh.org/security/advisories/CVE-2023-2283.txt Vendor Advisory