CVE-2016-0739

Published: Apr 13, 2016Modified: May 6, 2026

5.9

Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability: 2.2 / Impact: 3.6

Source: 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."

Affected (9)

Products: Redhat: Enterprise Linux · Canonical: Ubuntu Linux · Libssh: Libssh · +2 more

Show all products

Redhat: Enterprise Linux · Canonical: Ubuntu Linux · Libssh: Libssh · Fedoraproject: Fedora · Debian: Debian Linux

1 product

Enterprise Linux

1 product

1 product

1 product

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Redhat Enterprise Linux	Version 7.0

Configuration B

3 vulnerable

Vulnerable Software	Affected Versions
Canonical Ubuntu Linux	Version 12.04
Canonical Ubuntu Linux	Version 14.04
Canonical Ubuntu Linux	Version 15.10

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Libssh Libssh	Up to 0.7.2

Configuration D

2 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 22
Fedoraproject Fedora	Version 23

Configuration E

2 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 7.0
Debian Debian Linux	Version 8.0

Related CWEs

Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

References (20)

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html

Source: secalert@redhat.com

http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html

Source: secalert@redhat.com

http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html

Source: secalert@redhat.com

http://rhn.redhat.com/errata/RHSA-2016-0566.html

Source: secalert@redhat.com

http://www.debian.org/security/2016/dsa-3488

Source: secalert@redhat.com

http://www.ubuntu.com/usn/USN-2912-1

Source: secalert@redhat.com

https://puppet.com/security/cve/CVE-2016-0739

Source: secalert@redhat.com

https://security.gentoo.org/glsa/201606-12

Source: secalert@redhat.com

Third Party Advisory

https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/

Source: secalert@redhat.com

Vendor Advisory

https://www.libssh.org/security/advisories/CVE-2016-0739.txt

Source: secalert@redhat.com

Vendor Advisory

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html

Source: af854a3a-2127-422b-91ae-364da2661108

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

Timeline

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