| 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 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libssh (PTS) | jessie, jessie (lts) | 0.6.3-4+deb8u6 | fixed |
| stretch (security) | 0.7.3-2+deb9u3 | fixed | |
| stretch (lts), stretch | 0.7.3-2+deb9u4 | fixed | |
| buster (security), buster, buster (lts) | 0.8.7-1+deb10u2 | fixed | |
| bullseye (security), bullseye | 0.9.8-0+deb11u1 | fixed | |
| bookworm (security), bookworm | 0.10.6-0+deb12u1 | fixed | |
| sid, trixie | 0.11.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | 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