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CVE-2016-0787

Status Candidate

Overview

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."

Related Files

Gentoo Linux Security Advisory 201606-12
Posted Jun 26, 2016
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201606-12 - Multiple vulnerabilities have been found in libssh and libssh2, the worst of which allows remote attackers to cause Denial of Service. Versions less than 0.7.3 are affected.

tags | advisory, remote, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2014-8132, CVE-2016-0739, CVE-2016-0787
MD5 | 8c08e9a6fc7ed135ddc8a317e28e1d4c
Red Hat Security Advisory 2016-0428-01
Posted Mar 10, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0428-01 - The libssh2 packages provide a library that implements the SSHv2 protocol. A type confusion issue was found in the way libssh2 generated ephemeral secrets for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use significantly less secure random parameters.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2016-0787
MD5 | 522a2f962789862cfee35ece70a5cea0
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