Scientific Linux Security Update : nss and nspr on SL5.x i386/x86_64

This script is Copyright (C) 2013 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

It was discovered that NSS leaked timing information when decrypting
TLS/SSL and DTLS protocol encrypted records when CBC-mode cipher
suites were used. A remote attacker could possibly use this flaw to
retrieve plain text from the encrypted packets by using a TLS/SSL or
DTLS server as a padding oracle. (CVE-2013-1620)

An out-of-bounds memory read flaw was found in the way NSS decoded
certain certificates. If an application using NSS decoded a malformed
certificate, it could cause the application to crash. (CVE-2013-0791)

This update also fixes the following bugs :

- A defect in the FreeBL library implementation of the
Diffie-Hellman (DH) protocol previously caused Openswan
to drop connections.

- A memory leak in the nssutil_ReadSecmodDB() function has
been fixed.

In addition, the nss package has been upgraded to upstream version
3.14.3, and the nspr package has been upgraded to upstream version
4.9.5. These updates provide a number of bug fixes and enhancements
over the previous versions.

Note that while upstream NSS version 3.14 prevents the use of
certificates that have an MD5 signature, this erratum includes a patch
that allows such certificates by default. To prevent the use of
certificates that have an MD5 signature, set the
'NSS_HASH_ALG_SUPPORT' environment variable to '-MD5'.

After installing this update, applications using NSS or NSPR must be
restarted for this update to take effect.

See also :

http://www.nessus.org/u?06eeabef

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 69223 ()

Bugtraq ID:

CVE ID: CVE-2013-0791
CVE-2013-1620