National Vulnerability Database (NVD) National Vulnerability Database (CVE-2012-4561)

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NVD contains:

CVE Vulnerabilities: 56741
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CPE Names: 73736

Last updated: Wed Jun 19 21:14:10 EDT 2013

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Vulnerability Summary for CVE-2012-4561

Original release date:11/30/2012

Last revised:03/02/2013

Source: US-CERT/NIST

Overview

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 cause a denial of service (crash) via unspecified vectors.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)

Impact Subscore: 2.9

Exploitability Subscore: 10.0

CVSS Version 2 Metrics:

Access Vector: Network exploitable

Access Complexity: Low

**NOTE: Access Complexity scored Low due to insufficient information

Authentication: Not required to exploit

Impact Type:Allows disruption of serviceUnknown

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External Source: MISC

Name: https://bugzilla.redhat.com/show_bug.cgi?id=871617

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=871617

External Source: XF

Name: libssh-multiple-dos(80220)

Hyperlink:http://xforce.iss.net/xforce/xfdb/80220

External Source: UBUNTU

Name: USN-1640-1

Hyperlink:http://www.ubuntu.com/usn/USN-1640-1

External Source: BID

Name: 56604

Hyperlink:http://www.securityfocus.com/bid/56604