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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
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	Issue Tracking Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/
https://security.gentoo.org/glsa/202312-05
https://security.netapp.com/advisory/ntap-20240201-0005/
https://www.libssh.org/security/advisories/CVE-2023-2283.txt	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:libssh:libssh::::::::
	cpe:2.3:a:libssh:libssh::::::::

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

History

No history.

Information

Published : 2023-05-26 18:15

Updated : 2024-02-01 17:15

NVD link : CVE-2023-2283

Mitre link : CVE-2023-2283

CVE.ORG link : CVE-2023-2283

JSON object : View

Products Affected

redhat

enterprise_linux

fedoraproject

fedora

libssh

libssh

CWE

CWE-287

Improper Authentication

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