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."
Metrics
CVSS 3.0 5.9/10
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
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/201606-12Third Party Advisory
- https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/Vendor Advisory
- https://www.libssh.org/security/advisories/CVE-2016-0739.txtVendor Advisory
- 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/201606-12Third Party Advisory
- https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/Vendor Advisory
- https://www.libssh.org/security/advisories/CVE-2016-0739.txtVendor Advisory
Timeline
- Published
- Apr 13, 2016
- Last modified
- Jun 17, 2026
- NVD status
- Modified