Rapid7 Vulnerability & Exploit Database

MFSA2015-70 Thunderbird: NSS accepts export-length DHE keys with regular DHE cipher suites (CVE-2015-4000)

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MFSA2015-70 Thunderbird: NSS accepts export-length DHE keys with regular DHE cipher suites (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
09/14/2015
Modified
01/08/2018

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)

  • mozilla-thunderbird-upgrade-31_8
  • mozilla-thunderbird-upgrade-38_1

References

  • mozilla-thunderbird-upgrade-31_8
  • mozilla-thunderbird-upgrade-38_1

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