CVE-2016-0739: Infoleak
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2016-0739?
CVE-2016-0739 is rated as high severity due to potential man-in-the-middle attacks leading to decryption of SSH sessions.
How do I fix CVE-2016-0739?
To fix CVE-2016-0739, upgrade libssh to version 0.7.3 or later as well as update any affected operating systems like Red Hat, Ubuntu, Fedora, or Debian.
Which versions of libssh are affected by CVE-2016-0739?
CVE-2016-0739 affects libssh versions prior to 0.7.3, specifically up to version 0.7.2.
What types of key exchange methods are impacted by CVE-2016-0739?
CVE-2016-0739 impacts the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods.
Can CVE-2016-0739 lead to unauthorized access?
Yes, CVE-2016-0739 can facilitate man-in-the-middle attacks, enabling attackers to intercept or decrypt SSH sessions.