CVE-2016-0739

Published on: 04/13/2016 12:00:00 AM UTC

Last Modified on: 03/23/2021 11:27:13 PM UTC

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

Certain versions of Ubuntu Linux from Canonical contain the following vulnerability:

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."

  • CVE-2016-0739 has been assigned by [email protected] to track the vulnerability - currently rated as MEDIUM severity.

CVSS3 Score: 5.9 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK HIGH NONE NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED HIGH NONE NONE

CVSS2 Score: 4.3 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK MEDIUM NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL NONE NONE

CVE References

Description Tags Link
USN-2912-1: libssh vulnerabilities | Ubuntu www.ubuntu.com
text/html
URL Logo UBUNTU USN-2912-1
Debian -- Security Information -- DSA-3488-1 libssh www.debian.org
Depreciated Link
text/html
URL Logo DEBIAN DSA-3488
CVE-2016-0739 - libssh Vulnerability | Puppet puppet.com
text/html
URL Logo CONFIRM puppet.com/security/cve/CVE-2016-0739
[SECURITY] Fedora 22 Update: libssh-0.7.3-1.fc22 lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2016-dc9e8da03c
Vendor Advisory
www.libssh.org
text/plain
CONFIRM www.libssh.org/security/advisories/CVE-2016-0739.txt
[SECURITY] Fedora 23 Update: libssh-0.7.3-1.fc23 lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2016-d9f950c779
libssh and libssh2: Multiple vulnerabilities (GLSA 201606-12) — Gentoo security Third Party Advisory
security.gentoo.org
text/html
URL Logo GENTOO GLSA-201606-12
libssh 0.7.3 (security and bugfix release) – libssh Vendor Advisory
www.libssh.org
text/html
URL Logo CONFIRM www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/
Red Hat Customer Portal web.archive.org
text/html
Inactive LinkNot Archived
URL Logo REDHAT RHSA-2016:0566
openSUSE-SU-2016:0880-1: moderate: Security update for libssh lists.opensuse.org
text/html
URL Logo SUSE openSUSE-SU-2016:0880

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System
CanonicalUbuntu Linux12.04AllAllAll
Operating
System
CanonicalUbuntu Linux14.04AllAllAll
Operating
System
CanonicalUbuntu Linux15.10AllAllAll
Operating
System
CanonicalUbuntu Linux12.04AllAllAll
Operating
System
CanonicalUbuntu Linux14.04AllAllAll
Operating
System
CanonicalUbuntu Linux15.10AllAllAll
Operating
System
DebianDebian Linux7.0AllAllAll
Operating
System
DebianDebian Linux8.0AllAllAll
Operating
System
DebianDebian Linux7.0AllAllAll
Operating
System
DebianDebian Linux8.0AllAllAll
Operating
System
FedoraprojectFedora22AllAllAll
Operating
System
FedoraprojectFedora23AllAllAll
Operating
System
FedoraprojectFedora22AllAllAll
Operating
System
FedoraprojectFedora23AllAllAll
ApplicationLibsshLibsshAllAllAllAll
Operating
System
RedhatEnterprise Linux7.0AllAllAll
Operating
System
RedhatEnterprise Linux7.0AllAllAll
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*:
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*:
  • cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*:
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*:
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*:
  • cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*:
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*:
  • cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*:
  • cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*:
  • cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*:
  • cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*:
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*: