RHSA-2013:1144: Moderate: nss, nss-util, nss-softokn, and nspr security update

First published: Wed Aug 07 2013(Updated: )

Network Security Services (NSS) is a set of libraries designed to support<br>the cross-platform development of security-enabled client and server<br>applications. Netscape Portable Runtime (NSPR) provides platform<br>independence for non-GUI operating system facilities. nss-softokn provides<br>an NSS softoken cryptographic module.<br>It was discovered that NSS leaked timing information when decrypting<br>TLS/SSL and DTLS protocol encrypted records when CBC-mode cipher suites<br>were used. A remote attacker could possibly use this flaw to retrieve plain<br>text from the encrypted packets by using a TLS/SSL or DTLS server as a<br>padding oracle. (CVE-2013-1620)<br>An out-of-bounds memory read flaw was found in the way NSS decoded certain<br>certificates. If an application using NSS decoded a malformed certificate,<br>it could cause the application to crash. (CVE-2013-0791)<br>Red Hat would like to thank the Mozilla project for reporting<br>CVE-2013-0791. Upstream acknowledges Ambroz Bizjak as the original reporter<br>of CVE-2013-0791.<br>This update also fixes the following bugs:<br><li> The RHBA-2013:0445 update (which upgraded NSS to version 3.14) prevented</li> the use of certificates that have an MD5 signature. This caused problems in<br>certain environments. With this update, certificates that have an MD5<br>signature are once again allowed. To prevent the use of certificates that<br>have an MD5 signature, set the "NSS_HASH_ALG_SUPPORT" environment variable<br>to "-MD5". (BZ#957603)<br><li> Previously, the sechash.h header file was missing, preventing certain</li> source RPMs (such as firefox and xulrunner) from building. (BZ#948715)<br><li> A memory leak in the nssutil_ReadSecmodDB() function has been fixed.</li> (BZ#984967)<br>In addition, the nss package has been upgraded to upstream version 3.14.3,<br>the nss-util package has been upgraded to upstream version 3.14.3, the<br>nss-softokn package has been upgraded to upstream version 3.14.3, and the<br>nspr package has been upgraded to upstream version 4.9.5. These updates<br>provide a number of bug fixes and enhancements over the previous versions.<br>(BZ#927157, BZ#927171, BZ#927158, BZ#927186)<br>Users of NSS, NSPR, nss-util, and nss-softokn are advised to upgrade to<br>these updated packages, which fix these issues and add these enhancements.<br>After installing this update, applications using NSS, NSPR, nss-util, or<br>nss-softokn must be restarted for this update to take effect.<br>

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