CVE-2016-0787

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."
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
redhatCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 87%
VendorProductVersion
opensuseopensuse
13.2
libssh2libssh2
𝑥
≤ 1.6.0
debiandebian_linux
7.0
debiandebian_linux
8.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libssh2
bullseye
1.9.0-2+deb11u1
fixed
bookworm
1.10.0-3
fixed
sid
1.11.1-1
fixed
trixie
1.11.1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libssh2
yakkety
Fixed 1.7.0-1ubuntu0.1
released
xenial
Fixed 1.5.0-2ubuntu0.1
released
wily
ignored
trusty
Fixed 1.4.3-2ubuntu0.1
released
precise
Fixed 1.2.8-2ubuntu0.1
released
Common Weakness Enumeration
References
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
https://www.libssh2.org/CVE-2016-0787.patch
https://www.libssh2.org/adv_20160223.html
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
https://www.libssh2.org/CVE-2016-0787.patch
https://www.libssh2.org/adv_20160223.html