National Vulnerability Database (NVD) National Vulnerability Database (CVE-2012-4559)

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NVD contains:

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Last updated: Fri May 24 05:09:17 EDT 2013

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Vulnerability Summary for CVE-2012-4559

Original release date:11/30/2012

Last revised:03/02/2013

Source: US-CERT/NIST

Overview

Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2) channel_request function in channels.c, (3) ssh_userauth_pubkey function in auth.c, (4) sftp_parse_attr_3 function in sftp.c, and (5) try_publickey_from_file function in keyfiles.c in libssh before 0.5.3 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:6.8 (MEDIUM) (AV:N/AC:M/Au:N/C:P/I:P/A:P) (legend)

Impact Subscore: 6.4

Exploitability Subscore: 8.6

CVSS Version 2 Metrics:

Access Vector: Network exploitable; Victim must voluntarily interact with attack mechanism

Access Complexity: Medium

Authentication: Not required to exploit

Impact Type:Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

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External Source: MISC

Name: https://bugzilla.redhat.com/show_bug.cgi?id=871612

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=871612

External Source: XF

Name: libssh-code-execution(80218)

Hyperlink:http://xforce.iss.net/xforce/xfdb/80218

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