U radu programskog paketa Network Security Services (NSS) otkriven je propust kojeg udaljeni napadač može iskoristiti za napad ubacivanjem posrednika i otkrivanje osjetljivih informacija.

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Fedora Update Notification
FEDORA-2011-17399
2011-12-23 03:10:48
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Name        : nss
Product     : Fedora 15
Version     : 3.13.1
Release     : 10.fc15
URL         : http://www.mozilla.org/projects/security/pki/nss/
Summary     : Network Security Services
Description :
Network Security Services (NSS) is a set of libraries designed to
support cross-platform development of security-enabled client and
server applications. Applications built with NSS can support SSL v2
and v3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME, X.509
v3 certificates, and other security standards.

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Update Information:

The latest version of Firefox and Thunderbird have the following changes:

* Added Type Inference, significantly improving JavaScript performance
* Added support for querying Do Not Track status via JavaScript
* Added support for font-stretch
* Improved support for text-overflow
* Improved standards support for HTML5, MathML, and CSS
* Fixed several stability issues
* Fixed several security issues

Notable nss changes include:

1. SSL 2.0 is disabled by default.

2. A defense against the SSL 3.0 and TLS 1.0 CBC chosen plaintext attack
demonstrated by Rizzo and Duong (CVE-2011-3389) is enabled by default.
Set the SSL_CBC_RANDOM_IV SSL option to PR_FALSE to disable it.

3. SHA-224 is supported.

4. Added PORT_ErrorToString and PORT_ErrorToName to return the
error message and symbolic name of an NSS error code.

5. Added NSS_GetVersion to return the NSS version string.

6. Added experimental support of RSA-PSS to the softoken only
(contributed by Hanno BÄ