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."

CVSS v3.0 5.9 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.9^/10

CVSS v3.0 : MEDIUM

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

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

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

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:23:::::::*
	cpe:2.3:o:fedoraproject:fedora:22:::::::*

Configuration 2 (hide)

cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*

Configuration 4 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:7.0:::::::*

Information

Published : 2016-04-13 10:59

Updated : 2018-10-30 09:27

NVD link : CVE-2016-0787

Mitre link : CVE-2016-0787

JSON object : View

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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Products Affected

debian

debian_linux

opensuse

opensuse

fedoraproject

fedora

libssh2

libssh2

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