CVE-2016-0787 Information

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 Vector

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

Reference

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/adv_20160223.html https://www.libssh2.org/CVE-2016-0787.patch

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.9