FreeBSD : NSS -- MD5 downgrade in TLS 1.2 signatures (10f7bc76-0335-4a88-b391-0b05b3a8ce1c) (SLOTH)

This script is Copyright (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

The Mozilla Project reports :

Security researcher Karthikeyan Bhargavan reported an issue in Network
Security Services (NSS) where MD5 signatures in the server signature
within the TLS 1.2 ServerKeyExchange message are still accepted. This
is an issue since NSS has officially disallowed the accepting MD5 as a
hash algorithm in signatures since 2011. This issues exposes NSS based
clients such as Firefox to theoretical collision-based forgery
attacks.

See also :

https://www.mozilla.org/security/advisories/mfsa2015-150/
https://hg.mozilla.org/projects/nss/rev/94e1157f3fbb
http://www.nessus.org/u?59d4deb5

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 87609 ()

Bugtraq ID:

CVE ID: CVE-2015-7575

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