CVE-2016-0787

Home/CVE/The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, whi

CVE

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

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.".

MEDIUM · CVSS 5.9 EPSS 0.03148

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules0 YARA rules0

⬡

Weakness Classification

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

▤

Affected Products & Versions

fedoraproject fedoraall versions
opensuseall versions
libssh2<= 1.6.0
debian linuxall versions

▣

Scoring & Timeline

5.9

MEDIUM · CVSS v3.0 · secalert@redhat.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD13 Apr 2016 · 05:59 PM

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

⚑

Vendor Advisories

suse-csafopenSUSE-SU-2024:10190-1
suse-csafSUSE-SU-2017:2699-1
suse-csafSUSE-SU-2017:2700-1
suse-csafSUSE-SU-2016:0718-1
suse-csafSUSE-SU-2016:0723-1
Show all 6 vendor advisoriesrhsaRHSA-2016:0428Moderate

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

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

Show all 12 references

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/201606-12Third Party Advisory

https://www.libssh2.org/CVE-2016-0787.patchPatch

https://www.libssh2.org/adv_20160223.htmlVendor Advisory

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