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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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Popularity:
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63,289 views
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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
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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.
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.
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