CVE-2016-0739

5.9 MEDIUM
Published: April 13, 2016 Modified: May 06, 2026
View on NVD

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."

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://www.ubuntu.com/usn/USN-2912-1
Source: secalert@redhat.com
https://security.gentoo.org/glsa/201606-12
Source: secalert@redhat.com
Third Party Advisory
https://www.libssh.org/security/advisories/CVE-2016-0739.txt
Source: secalert@redhat.com
Vendor Advisory
http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html
Source: af854a3a-2127-422b-91ae-364da2661108
http://rhn.redhat.com/errata/RHSA-2016-0566.html
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.debian.org/security/2016/dsa-3488
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.ubuntu.com/usn/USN-2912-1
Source: af854a3a-2127-422b-91ae-364da2661108
https://puppet.com/security/cve/CVE-2016-0739
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.gentoo.org/glsa/201606-12
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.libssh.org/security/advisories/CVE-2016-0739.txt
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

20 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.9 / 10.0
EPSS (Exploit Probability)
4.3%
89th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

libssh debian canonical fedoraproject redhat