Medium severity · published Apr 13, 2016
CVE-2016-0739
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…
5.9
CVSS
2.4%
EPSS
No
On KEV
Description
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."
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
7.0; 8.0 · source: NVD
EL
Enterprise Linux · Redhat
7.0 · source: NVD
FE
Fedora · Fedoraproject
22; 23 · source: NVD
LI
Libssh · Libssh
through 0.7.2 · source: NVD
UL
Ubuntu Linux · Canonical
12.04; 14.04; 15.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-0739
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-0739
lists.fedoraproject.org
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html
lists.fedoraproject.org
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-0566.html
www.debian.org
http://www.debian.org/security/2016/dsa-3488
www.ubuntu.com
http://www.ubuntu.com/usn/USN-2912-1
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