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CVE-2016-0739

Date: April 13, 2016

libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 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."

Language: C

Severity Score

Related Resources (14)

https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/
https://access.redhat.com/security/cve/CVE-2016-0739
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html
http://www.ubuntu.com/usn/USN-2912-1
http://www.debian.org/security/2016/dsa-3488
https://security.gentoo.org/glsa/201606-12
https://www.libssh.org/security/advisories/CVE-2016-0739.txt
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html
https://nvd.nist.gov/vuln/detail/CVE-2016-0739
http://rhn.redhat.com/errata/RHSA-2016-0566.html
https://security-tracker.debian.org/tracker/CVE-2016-0739
http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html
https://puppet.com/security/cve/CVE-2016-0739
https://www.mend.io/vulnerability-database/CVE-2016-0739

Severity Score

Weakness Type (CWE)

Exposure of Sensitive Information to an Unauthorized Actor

CWE-200

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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