CVE-2016-0739 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...
MediumCVSS 5.9
EPSS 2.4%
- Published
- Updated
- Exploit status
- No public exploit known
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 products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian/libssh(Debian:12) | < 0.6.3-4.3 | 0.6.3-4.3 |
| debian/libssh(Debian:13) | < 0.6.3-4.3 | 0.6.3-4.3 |
| debian/libssh(Debian:14) | < 0.6.3-4.3 | 0.6.3-4.3 |
| redhat enterprise linux | = 7.0 | No fix listed |
| Canonical Ubuntu Linux | = 12.04 | No fix listed |
| Canonical Ubuntu Linux | = 14.04 | No fix listed |
| Canonical Ubuntu Linux | = 15.10 | No fix listed |
| libssh | <= 0.7.2 | No fix listed |
| fedoraproject fedora | = 22 | No fix listed |
| fedoraproject fedora | = 23 | No fix listed |
| debian linux | = 7.0 | No fix listed |
| debian linux | = 8.0 | No fix listed |
References
- Debian Security Tracker CVE-2016-0739 vendor-advisory
- FEDORA-2016-d9f950c779 vendor-advisory
- FEDORA-2016-dc9e8da03c vendor-advisory
- openSUSE-SU-2016:0880 vendor-advisory
- RHSA-2016:0566 vendor-advisory
- DSA-3488 vendor-advisory
- USN-2912-1 vendor-advisory
- puppet.com
- GLSA-201606-12 third-party-advisory vendor-advisory
- www.libssh.org vendor-advisory
- www.libssh.org vendor-advisory
- bugs.debian.org issue-tracking