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Apache mod_rewrite Off-By-One Buffer Overflow Vulnerability
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Secunia Advisory:
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SA21197
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Release Date:
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2006-07-28
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Last Update:
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2006-07-29
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Critical:
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Moderately 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: | Apache 1.3.x
Apache 2.0.x
Apache 2.2.x
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| | CVE reference: | CVE-2006-3747 (Secunia mirror)
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Description:
A vulnerability has been reported in Apache HTTP Server, which potentially can be exploited by malicious people to compromise a vulnerable system.
The vulnerability is caused by a off-by-one error in mod_rewrite within the ldap scheme handling and can be exploited to cause a one-byte buffer overflow.
Successful exploitation may crash the web server process or allow execution of arbitrary code. However, this depends on the manner which Apache HTTP Server was compiled and also requires the following:
* Certain types of Rewrite rules are used where the beginning of the rewritten URL is controlled.
* The RewriteRule flags do not include the Forbidden (F), Gone (G), or NoEscape (NE) flag.
The vulnerability affects Apache 1.3 since 1.3.28, 2.0 since 2.0.46, and 2.2 since 2.2.0.
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, scan using the Network Software Inspector.
Solution:
Update to version 1.3.37, 2.0.59, or 2.2.3.
Provided and/or discovered by:
The vendor credits Mark Dowd, McAfee Avert Labs.
Changelog:
2006-07-29: Added link to US-CERT.
Original Advisory:
http://www.apache.org/dist/httpd/Announcement1.3.html
http://www.apache.org/dist/httpd/Announcement2.0.html
http://www.apache.org/dist/httpd/Announcement2.2.html
Other References:
US-CERT VU#395412:
http://www.kb.cert.org/vuls/id/395412
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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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