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Firefox IDN URL Domain Name Buffer Overflow
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Secunia Advisory:
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SA16764
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Release Date:
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2005-09-09
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Last Update:
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2005-09-23
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Critical:
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Highly critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Mozilla Firefox 1.x
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| | CVE reference: | CVE-2005-2871 (Secunia mirror)
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Description:
Tom Ferris has discovered a vulnerability in Firefox, which can be exploited by malicious people to cause a DoS (Denial of Service) or to compromise a user's system.
The vulnerability is caused due to an error in the handling of an IDN URLs that contains the 0xAD character in its domain name. This can be exploited to cause a heap-based buffer overflow.
Successful exploitation crashes Firefox and allows code execution but requires that the user is tricked into visiting a malicious web site or open a specially crafted HTML file.
NOTE: Exploit code is publicly available.
The vulnerability has been confirmed in version 1.0.6, and is reported to affect versions prior to 1.0.6, and version 1.5 Beta 1.
Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, using the Network Software Inspector.
Solution:
Update to version 1.0.7.
http://www.mozilla.org/products/firefox/
Provided and/or discovered by:
Tom Ferris
Changelog:
2005-09-12: Updated advisory.
2005-09-21: Updated "Solution" section.
2005-09-22: Added information about publicly available exploit code.
2005-09-23: Added link to MFSA 2005-57.
Original Advisory:
http://security-protocols.com/advisory/sp-x17-advisory.txt
Mozilla Foundation:
http://www.mozilla.org/security/announce/mfsa2005-57.html
Other References:
US-CERT VU#573857:
http://www.kb.cert.org/vuls/id/573857
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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