Vulnerability CVE-2013-0176
Published: 2013-02-05   Modified: 2013-02-06

Description:
The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a "Client: Diffie-Hellman Key Exchange Init" packet.

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Libssh -> Libssh 

 References:
http://www.libssh.org/2013/01/22/libssh-0-5-4-security-release/
http://xforce.iss.net/xforce/xfdb/81595
http://www.ubuntu.com/usn/USN-1707-1
http://secunia.com/advisories/51982
http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098094.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098065.html
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