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FreeBSD: libssh -- weak Diffie-Hellman secret generation (CVE-2016-0739)

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FreeBSD: libssh -- weak Diffie-Hellman secret generation (CVE-2016-0739)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
02/23/2016
Created
07/25/2018
Added
03/07/2016
Modified
10/30/2017

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."

Solution(s)

  • freebsd-upgrade-package-libssh

References

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