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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…
Medium5.9EPSS 2.4%
- Published
- Updated
- Reserved
- Assigned by
- redhat
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."
Timeline
ID reserved
By redhat
- 4 months later
· 4 months later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 2.4% · top 16% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Weakness
Affected products
n/a
- affected n/a
References (10)
- FEDORA-2016-d9f950c779 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- USN-2912-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://www.libssh.org/security/advisories/CVE-2016-0739.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://puppet.com/security/cve/CVE-2016-0739 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2016-dc9e8da03c (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- GLSA-201606-12 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- DSA-3488 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2016:0566 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2016:0880 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-0739)Record last updated .