Vulnerability CVE-2016-0739
Published: 2016-04-13

Description:
libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

Type:

CWE-200

 (Information Exposure)

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

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
Partial
None
None
Affected software
Redhat -> Enterprise linux 
Libssh -> Libssh 
Fedoraproject -> Fedora 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 References:
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html
http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html
http://rhn.redhat.com/errata/RHSA-2016-0566.html
http://www.debian.org/security/2016/dsa-3488
http://www.ubuntu.com/usn/USN-2912-1
https://puppet.com/security/cve/CVE-2016-0739
https://security.gentoo.org/glsa/201606-12
https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/
https://www.libssh.org/security/advisories/CVE-2016-0739.txt
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