Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2012-4561

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
30/11/2012
Last modified:
11/04/2025

Description

The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free "an invalid pointer on an error path," which might allow remote attackers to cause a denial of service (crash) via unspecified vectors.

Impact

Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* 0.5.2 (including)
cpe:2.3:a:libssh:libssh:0.4.7:*:*:*:*:*:*:*
cpe:2.3:a:libssh:libssh:0.4.8:*:*:*:*:*:*:*
cpe:2.3:a:libssh:libssh:0.5.0:*:*:*:*:*:*:*
cpe:2.3:a:libssh:libssh:0.5.0:rc1:*:*:*:*:*:*
cpe:2.3:a:libssh:libssh:0.5.1:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools