Vulnerability Note VU#377812
Mozilla Network Security Services (NSS) fails to properly process malformed SSLv2 server messages
A vulnerability in the way Mozilla Network Security Services (NSS) handles malformed SSLv2 server messages may lead to execution of arbitrary code.
The SSLv2 protocol uses a client master key to generate all subsequent session keys. The client master key is created using a public key recieved from the server during phase one of the SSL handshake. Mozilla NSS library contains a vulnerability in the way malformed SSLv2 server messages related to the public key are handled that may result in a buffer overflow. According to the Mozilla Foundation Security Advisory 2007-06:
SSL clients such as Firefox and Thunderbird can suffer a buffer overflow if a malicious server presents a certificate with a public key that is too small to encrypt the entire "Master Secret". Exploiting this overflow appears to be unreliable but possible if the SSLv2 protocol is enabled.
Note that this vulnerability may affect any application that uses the Mozilla NSS library.
A remote, unauthenticated attacker may be able to execute arbitrary code with the privileges of the user who is running the vulnerable application or cause a denial of service.
Systems Affected (Learn More)
|Vendor||Status||Date Notified||Date Updated|
|Fedora Project||Affected||-||07 Mar 2007|
|Gentoo Linux||Affected||-||05 Apr 2007|
|Mandriva, Inc.||Affected||-||07 Mar 2007|
|Mozilla||Affected||-||27 Feb 2007|
|Red Hat, Inc.||Affected||-||07 Mar 2007|
|rPath||Affected||-||07 Mar 2007|
|Slackware Linux Inc.||Affected||-||05 Apr 2007|
|Sun Microsystems, Inc.||Affected||-||05 Apr 2007|
|SUSE Linux||Affected||-||07 Mar 2007|
|Ubuntu||Affected||-||07 Mar 2007|
CVSS Metrics (Learn More)
This vulnerability was reported in Mozilla Foundation Security Advisory 2007-06. Mozilla credits iDefense with reporting this issue.
This document was written by Chris Taschner.
- CVE IDs: CVE-2007-0008
- Date Public: 23 Feb 2007
- Date First Published: 07 Mar 2007
- Date Last Updated: 05 Apr 2007
- Severity Metric: 12.72
- Document Revision: 59
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