Scientific Linux Security Update : nss, nss-util, nss-softokn, and nspr on SL6.x i386/x86_64

Medium Nessus Plugin ID 69279


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


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 :

- The SLBA-2013:0445 update (which upgraded NSS to version 3.14) prevented the use of certificates that have an MD5 signature. This caused problems in certain environments.
With this update, certificates that have an MD5 signature are once again allowed. To prevent the use of certificates that have an MD5 signature, set the 'NSS_HASH_ALG_SUPPORT' environment variable to '-MD5'.

- Previously, the sechash.h header file was missing, preventing certain source RPMs (such as firefox and xulrunner) from building.

- 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, the nss-util package has been upgraded to upstream version 3.14.3, the nss-softokn 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.

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


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 69279

File Name: sl_20130807_nss__nss_util__nss_softokn__and_nspr_on_SL6_x.nasl

Version: $Revision: 1.1 $

Type: local

Agent: unix

Published: 2013/08/09

Modified: 2013/08/09

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2013/08/07

Reference Information

CVE: CVE-2013-0791, CVE-2013-1620