CVE-2016-0739

Name	CVE-2016-0739
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."
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-425-1, DSA-3488-1
Debian Bugs	815663

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libssh (PTS)	buster	0.8.7-1+deb10u1	fixed
	buster (security)	0.8.7-1+deb10u2	fixed
	bullseye (security), bullseye	0.9.8-0+deb11u1	fixed
	bookworm, bookworm (security)	0.10.6-0+deb12u1	fixed
	sid, trixie	0.10.6-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
libssh	source	squeeze	0.4.5-3+squeeze3	DLA-425-1
libssh	source	wheezy	0.5.4-1+deb7u3	DSA-3488-1
libssh	source	jessie	0.6.3-4+deb8u2	DSA-3488-1
libssh	source	(unstable)	0.6.3-4.3		815663

Upstream fix: https://git.libssh.org/projects/libssh.git/commit/?h=v0-7&id=f8d0026c65fc8a55748ae481758e2cf376c26c86