CVE-2016-0739 Information

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.\

CVSS Vector

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

Reference

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

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.9