Firefox 3.0.3 Vulnerability Reported: Remote Denial of Service Attack
Security Research Aditya K Sood of SecNiche has discovered, and reported (via BugTraq at SecurityFocus) a null pointer bug, leading to a potential Remote Denial of Service exploit targeting the new version of Mozilla’s Firefox 3.0.3. The full advisory appears after the jump…
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From the Advisory: Mozilla Firefox User Interface Null Pointer Dereference Dispatcher Crash and Remote Denial of Service.*Version Tested:*
Mozilla 3.0.3 – 1.9.0 Branch /(Specifically for Latest Version)/
*Severity:*
High
*Description:*
The mozilla firefox is vulnerable to user interface event dispatcher null pointer dereference denial of service attacks. The dispatched event created dynamically leads to firefox crash when it is called directly or in a
defined loop with number of generated user interface events.The resultant crash results in:
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0×0000000000000007
Crashed Thread: 0
Thread 0 Crashed: 0 libxpcom_core.dylib nsTArray_base::Length() const + 11
(nsTArray.h:66)
1 libgklayout.dylib
nsContentUtils::
nsTArray&) + 261 (nsContentUtils.cpp:4083)This security issue is a result of unhandled exception which is a result
of null
pointer dereference.*Links:*
http://www.secniche.org/advisory.html
http://evilfingers.com/advisory/index.php
*Proof of Concept*
http://www.secniche.org/moz303/index.html
*Detection:* SecNiche confirmed this vulnerability affects Mozilla Firefox on Microsoft Windows XP SP2 platform.The versions tested are:
Mozilla 3.0.3 – 1.9.0 Branch
*Disclosure Timeline:*
Disclosed: 28 September 2008
Release Date. 28 September ,2008
*Vendor Response:*
Mozilla confirm this vulnerability.
*Credit:*
Aditya K Sood
*Disclaimer*
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There is no representation or warranties, either express or implied by or with respect to anything in this document, and shall not be liable for any implied warranties of merchantability or fitness for a particular purpose or for
any indirect special or consequential damages.
