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F5 Networks: K16674 (CVE-2015-4000): TLS vulnerability CVE-2015-4000

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F5 Networks: K16674 (CVE-2015-4000): TLS vulnerability CVE-2015-4000

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
05/20/2015
Created
07/25/2018
Added
02/16/2017
Modified
03/02/2020

Description

The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHE_EXPORT and then rewriting a ServerHello with DHE_EXPORT replaced by DHE, aka the "Logjam" issue.

Solution(s)

  • f5-big-ip-upgrade-latest

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