6.5

CVE-2023-2283

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Libssh ≫ Libssh Version >= 0.9.1 <= 0.9.6
Libssh ≫ Libssh Version >= 0.10.0 <= 0.10.4
Fedoraproject ≫ Fedora Version37
Redhat ≫ Enterprise Linux Version8.0
Redhat ≫ Enterprise Linux Version9.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.06% 0.601
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 6.5 3.9 2.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-287 Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

https://security.gentoo.org/glsa/202312-05
https://security.netapp.com/advisory/ntap-20240201-0005/
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://access.redhat.com/security/cve/CVE-2023-2283
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2189736
Third Party Advisory
Issue Tracking
https://www.libssh.org/security/advisories/CVE-2023-2283.txt
Vendor Advisory
http://seclists.org/fulldisclosure/2025/Feb/18