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Vulnerability record · CVE-2016-0787 · published 13 April 2016

CVE-2016-0787: Fedoraproject fedora information exposure vulnerability

Fedoraproject · Fedora

The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 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."

5.9 CVSS 3.0 Medium EPSS 2.6% · top 15.3% CWE-200 · Information exposure
5.9CVSS 3.0 base score, v2 4.3
2.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
24References
17 Jun 2026Last modified by NVD

Description

The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 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."

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177980.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178573.html
http://lists.opensuse.org/opensuse-updates/2016-03/msg00008.html
http://www.debian.org/security/2016/dsa-3487
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.securityfocus.com/bid/82514
https://bto.bluecoat.com/security-advisory/sa120
https://kc.mcafee.com/corporate/index?page=content&id=SB10156
https://puppet.com/security/cve/CVE-2016-0787
https://security.gentoo.org/glsa/201606-12 Third Party Advisory
https://www.libssh2.org/CVE-2016-0787.patch Patch
https://www.libssh2.org/adv_20160223.html Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177980.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178573.html
http://lists.opensuse.org/opensuse-updates/2016-03/msg00008.html
http://www.debian.org/security/2016/dsa-3487
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.securityfocus.com/bid/82514
https://bto.bluecoat.com/security-advisory/sa120
https://kc.mcafee.com/corporate/index?page=content&id=SB10156
https://puppet.com/security/cve/CVE-2016-0787
https://security.gentoo.org/glsa/201606-12 Third Party Advisory
https://www.libssh2.org/CVE-2016-0787.patch Patch
https://www.libssh2.org/adv_20160223.html Vendor Advisory

Track CVE-2016-0787 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2016-0787), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.