Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Enterprise Linux | 7.0 |
| Canonical | Ubuntu Linux | 12.04 |
| Libssh | Libssh | <= 0.7.2 |
| Fedoraproject | Fedora | 22 |
| Debian | Debian Linux | 7.0 |
Related Weaknesses (CWE)
References
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.h
- 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.h
- 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
FAQ
What is CVE-2016-0739?
CVE-2016-0739 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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...
How severe is CVE-2016-0739?
CVE-2016-0739 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-0739?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Enterprise Linux, Canonical Ubuntu Linux, Libssh Libssh, Fedoraproject Fedora, Debian Debian Linux.