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

Title : Apache "mod_rewrite" LDAP URI Handling Remote Off-By-One Buffer Overflow Vulnerability
VUPEN ID : VUPEN/ADV-2006-3017
CVE ID : CVE-2006-3747
Rated as : High Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-07-28


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

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).

Affected Products

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

Solution

Upgrade to Apache version 1.3.37, 2.0.59, or 2.2.3 :
http://httpd.apache.org/download.cgi

References

http://www.vupen.com/english/advisories/2006/3017
http://www.frsirt.com/english/reference/16998
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

Credits

Vulnerability reported by Mark Dowd

ChangeLog

2006-07-28 : Initial release
2006-07-28 : Updated Advisory

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