CVE catalog
CVE-2016-0739
libssh: CVE-2016-0739
- Severity
- Medium · CVSS 5.9
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.43% · Oct 25, 2026
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."
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libssh | sid | 0.12.2-1 | fixed |
| Debian | libssh | forky | 0.12.2-1 | fixed |
| Debian | libssh | trixie | 0.11.5-0+deb13u1 | fixed |
| Debian | libssh | trixie-security | 0.11.5-0+deb13u1 | fixed |
| Debian | libssh | bookworm | 0.10.6-0+deb12u2 | fixed |
| Debian | libssh | bookworm-security | 0.10.6-0+deb12u3 | fixed |
| Ubuntu | libssh | 14.04 | 0.5.4-1 | vulnerable |
| Ubuntu | libssh | 14.04 | 0.6.1-0ubuntu2 | vulnerable |
| Ubuntu | libssh | 14.04 | 0.6.1-0ubuntu3 | vulnerable |
| Ubuntu | libssh | 14.04 | 0.6.1-0ubuntu3.1 | vulnerable |
| Ubuntu | libssh | 14.04 | 0.6.1-0ubuntu3.3 | fixed |
| Ubuntu | libssh | 16.04 | 0.6.3-3ubuntu3 | vulnerable |
| Ubuntu | libssh | 16.04 | 0.6.3-4.1 | vulnerable |
| Ubuntu | libssh | 16.04 | 0.6.3-4.2 | vulnerable |
| Ubuntu | libssh | 16.04 | 0.6.3-4.2ubuntu1 | fixed |
| Suse | libssh | linux enterprise desktop 12 | 0.6.3-11.1 | fixed |
| Suse | libssh | linux enterprise desktop 12 sp1 | 0.6.3-11.1 | fixed |
| Suse | libssh | linux enterprise software development kit 12 | 0.6.3-11.1 | fixed |
| Suse | libssh | linux enterprise software development kit 12 sp1 | 0.6.3-11.1 | fixed |
| Suse | libssh | linux enterprise workstation extension 12 | 0.6.3-11.1 | fixed |
| Suse | libssh | linux enterprise workstation extension 12 sp1 | 0.6.3-11.1 | fixed |
| Suse | libssh | linux enterprise software development kit 11 sp4 | 0.2-5.22.1 | fixed |
| Suse | libssh | linux enterprise desktop 11 sp4 | 0.2-5.22.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libssh | source | sid | 0.6.3-4.3 | not yet assigned | Not reported | [815663] |
| Debian | libssh | source | forky | 0.6.3-4.3 | not yet assigned | Not reported | [815663] |
| Debian | libssh | source | trixie | 0.6.3-4.3 | not yet assigned | Not reported | [815663] |
| Debian | libssh | source | bookworm | 0.6.3-4.3 | not yet assigned | Not reported | [815663] |
| Ubuntu | libssh | deb | 14.04 | 0.6.1-0ubuntu3.3 | Not reported | UBUNTU-CVE-2016-0739 | Not reported |
| Ubuntu | libssh | deb | 16.04 | 0.6.3-4.2ubuntu1 | Not reported | UBUNTU-CVE-2016-0739 | Not reported |
| Suse | libssh | rpm | linux enterprise desktop 12 | 0.6.3-11.1 | Not reported | SUSE-SU-2016:0625-1 | Not reported |
| Suse | libssh | rpm | linux enterprise desktop 12 sp1 | 0.6.3-11.1 | Not reported | SUSE-SU-2016:0625-1 | Not reported |
| Suse | libssh | rpm | linux enterprise software development kit 12 | 0.6.3-11.1 | Not reported | SUSE-SU-2016:0625-1 | Not reported |
| Suse | libssh | rpm | linux enterprise software development kit 12 sp1 | 0.6.3-11.1 | Not reported | SUSE-SU-2016:0625-1 | Not reported |
| Suse | libssh | rpm | linux enterprise workstation extension 12 | 0.6.3-11.1 | Not reported | SUSE-SU-2016:0625-1 | Not reported |
| Suse | libssh | rpm | linux enterprise workstation extension 12 sp1 | 0.6.3-11.1 | Not reported | SUSE-SU-2016:0625-1 | Not reported |
| Suse | libssh | rpm | linux enterprise software development kit 11 sp4 | 0.2-5.22.1 | Not reported | SUSE-SU-2016:0622-1 | Not reported |
| Suse | libssh | rpm | linux enterprise desktop 11 sp4 | 0.2-5.22.1 | Not reported | SUSE-SU-2016:0622-1 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [libssh-4]Unknown
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
- [libssh-dev]Unknown
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
- [libssh-doc]Unknown
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· all · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· all · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· all · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· all · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
- [libssh-gcrypt-4]Unknown
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
- [libssh-gcrypt-dev]Unknown
Source package: [libssh]
Details (4)
0.10.6-0+deb12u2· amd64 · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u2· arm64 · bookwormFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
0.10.6-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · bookworm; dsa · libssh · debian · 12
[Debian 13 (Trixie)]
- [libssh-4]Unknown
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· amd64 · trixieFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.2-1+deb13u1· arm64 · trixieFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.5-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.5-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
- [libssh-dev]Unknown
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· amd64 · trixieFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.2-1+deb13u1· arm64 · trixieFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.5-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.5-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
- [libssh-doc]Unknown
Source package: [libssh]
Details (4)
0.11.2-1+deb13u1· all · trixieFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.2-1+deb13u1· all · trixieFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.5-0+deb13u1· all · trixie-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
0.11.5-0+deb13u1· all · trixie-securityFixed · Fixed:
0.6.3-4.3dsa · libssh · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2016:0566]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2016_0622-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2016-0739]
- [https://osv.dev/vulnerability/DLA-425-1]
- [https://osv.dev/vulnerability/DSA-3488-1]
- [https://osv.dev/vulnerability/SUSE-SU-2016:0622-1]
- [https://osv.dev/vulnerability/SUSE-SU-2016:0625-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2016-0739]
- [https://security-tracker.debian.org/tracker/CVE-2016-0739]
- [https://wid.cert-bund.de/.well-known/csaf/white/2016/wid-sec-w-2024-1054.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]