[SECURITY] [DLA 507-1] nss security update

Package : nss
Version : 2:3.14.5-1+deb7u7
CVE ID : CVE-2015-4000
Debian Bug : N/A

A vulnerability has been found in nss.

CVE-2015-4000

With 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.

The solution in nss was to not accept bit lengths less than 1024.
This may potentially be a backwards incompatibility issue but such
low bit lengths should not be in use so it was deemed acceptable.

For Debian 7 "Wheezy", these problems have been fixed in version
2:3.14.5-1+deb7u7.

We recommend that you upgrade your nss packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

--------------------- Ola Lundqvist ---------------------------
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