Information disclosure in Libssh
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 it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."
Vulnerability class: Information Disclosure
EPSS: 0.024 (82.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Libssh
- Canonical Ubuntu_linux — versions 12.04, 14.04, 15.10
- Debian Debian_linux — versions 7.0, 8.0
- Fedoraproject Fedora — versions 22, 23
- Redhat Enterprise_linux — versions 7.0
- N/a — versions n/a
Weakness classification (CWE)
References
- secalert@redhat.com (vendor-advisory, x_refsource_FEDORA)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Vendor Advisory)
- secalert@redhat.com (x_refsource_CONFIRM)
- secalert@redhat.com (vendor-advisory, x_refsource_FEDORA)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- secalert@redhat.com (vendor-advisory, x_refsource_DEBIAN)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Vendor Advisory)
- secalert@redhat.com (vendor-advisory, x_refsource_SUSE)
Frequently asked questions
- What is CVE-2016-0739?
- CVE-2016-0739 is a medium-severity vulnerability in Libssh, classified under Information Disclosure. CVSS score: 5.9/10. Published 2016-04-13.
- How severe is CVE-2016-0739?
- Medium severity. CVSS v3 base score is 5.9 out of 10.