[NEWS] Apache "mod_rewrite" LDAP URI Handling Remote Off-By-One Buffer Overflow

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Apache "mod_rewrite" LDAP URI Handling Remote Off-By-One Buffer Overflow
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SUMMARY

A vulnerability has been identified in Apache, which could be exploited by
remote attackers to compromise a vulnerable server or cause a denial of
service. This flaw is due to an off-by-one buffer overflow error in the
"escape_absolute_uri()" function when processing a specially crafted LDAP
URI, which could be exploited by remote attackers to execute arbitrary
commands on a web server configured with certain Rewrite rules (the
attacker must be able to control the initial part of the rewritten URL,
and the rule must not contain a forbidden [F], gone [G], or NoEscape [NE]
flag).

DETAILS

Vulnerable Systems:
* Apache versions 1.3.28 through 1.3.36
* Apache versions 2.0.46 through 2.0.58
* Apache versions 2.2.0 through 2.2.2

Immune Systems:
* Apache versions 1.3.37
* Apache versions 2.0.59
* Apache versions 2.2.2

Off-by-one error in the the LDAP scheme handling in the Rewrite module
(mod_rewrite) in Apache 1.3 from 1.3.28, 2.0.46 and other versions before
2.0.59, and 2.2, when RewriteEngine is enabled, allows remote attackers to
cause a denial of service (application crash) and possibly execute
arbitrary code via crafted URLs that are not properly handled using
certain rewrite rules.

CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3747>
CVE-2006-3747

Patch Information:
Patch details can be found at:
<http://svn.apache.org/viewvc?view=rev&revision=426144>
http://svn.apache.org/viewvc?view=rev&revision=426144


ADDITIONAL INFORMATION

The information has been provided by Mark Dowd.
The original article can be found at:
<http://www.apache.org/dist/httpd/Announcement2.0.html>
http://www.apache.org/dist/httpd/Announcement2.0.html



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