CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
52.0%
A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in thepki_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.
Vendor | Product | Version | CPE |
---|---|---|---|
libssh | libssh | * | cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* |
fedoraproject | fedora | 37 | cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* |
redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |
packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html
access.redhat.com/security/cve/CVE-2023-2283
bugzilla.redhat.com/show_bug.cgi?id=2189736
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/
security.gentoo.org/glsa/202312-05
security.netapp.com/advisory/ntap-20240201-0005/
www.libssh.org/security/advisories/CVE-2023-2283.txt
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
52.0%