National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2012-4559 Detail

Description

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.

Source:  MITRE
Description Last Modified:  11/30/2012

Impact

CVSS v2.0 Severity and Metrics:

Base Score: 6.8 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Victim must voluntarily interact with attack mechanism
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html
http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html
http://www.debian.org/security/2012/dsa-2577
http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/ Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:175
http://www.openwall.com/lists/oss-security/2012/11/20/3
http://www.securityfocus.com/bid/56604
http://www.ubuntu.com/usn/USN-1640-1
https://bugzilla.redhat.com/show_bug.cgi?id=871612
https://exchange.xforce.ibmcloud.com/vulnerabilities/80218

Technical Details

Vulnerability Type (View All)

  • Resource Management Errors (CWE-399)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:libssh:libssh:0.4.7:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:libssh:libssh:0.4.8:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:libssh:libssh:0.5.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:libssh:libssh:0.5.0:rc1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:libssh:libssh:0.5.1:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
0.5.2


Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2012-4559
NVD Published Date:
11/30/2012
NVD Last Modified:
08/28/2017