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Category:   Application (Web Server/CGI)  >   Apache Tomcat Vendors:   Apache Software Foundation
Apache Tomcat JK Web Server Connector Buffer Overflow in map_uri_to_worker() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1017719
SecurityTracker URL:  http://securitytracker.com/id/1017719
CVE Reference:   CVE-2007-0774   (Links to External Site)
Date:  Mar 2 2007
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Tomcat JK Web Server Connector 1.2.19, 1.2.20 only; included in Tomcat 4.1.34, 5.5.20
Description:   A vulnerability was reported in Apache Tomcat JK Web Server Connector. A remote user can execute arbitrary code on the target system.

A remote user can send specially crafted URL that is longer than 4095 characters to trigger a stack overflow in the map_uri_to_worker() function in the 'mod_jk.so' library and execute arbitrary code on the target system. The code will run with the privileges of the target service.

Only versions 1.2.19 and 1.2.20 of the Apache Tomcat JK Web Server Connector are affected.

The vendor was notified on February 16, 2007.

TippingPoint disclosed this vulnerability.

The original advisory is available at:

http://www.zerodayinitiative.com/advisories/ZDI-07-008.html

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   The vendor has issued a fixed version of the connector (1.2.21).

The Apache advisory is available at:

http://tomcat.apache.org/connectors-doc/miscellaneous/changelog.html

Vendor URL:  tomcat.apache.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Mar 2 2007 (Red Hat Issues Fix for mod_jk) Apache Tomcat JK Web Server Connector Buffer Overflow in map_uri_to_worker() Lets Remote Users Execute Arbitrary Code
Red Hat has released a fix for mod_jk on Red Hat Application Stack.
Jan 30 2008 (Cisco Issues Fix for Cisco Wireless Control System) Apache Tomcat JK Web Server Connector Buffer Overflow in map_uri_to_worker() Lets Remote Users Execute Arbitrary Code
Cisco has issued a fix for Cisco Wireless Control System.



 Source Message Contents

Date:  Fri, 2 Mar 2007 09:56:56 -0800
Subject:  ZDI-07-008: Apache Tomcat JK Web Server Connector Long URL Stack Overflow

ZDI-07-008: Apache Tomcat JK Web Server Connector Long URL Stack
            Overflow Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-07-008.html
March  2, 2007

-- CVE ID:
CVE-2007-0774

-- Affected Vendor:
Apache

-- Affected Products:
Tomcat JK Web Server Connector 1.2.19
Tomcat JK Web Server Connector 1.2.20 
Tomcat 4.1.34
Tomcat 5.5.20

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since February 26, 2007 by Digital Vaccine protection
filter ID 5152. For further product information on the TippingPoint IPS:

    http://www.tippingpoint.com 

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Apache Tomcat JK Web Server Connector.
Authentication is not required to exploit this vulnerability.

The specific flaw exists in the URI handler for the mod_jk.so library,
map_uri_to_worker(), defined in native/common/jk_uri_worker_map.c. When
parsing a long URL request, the URI worker map routine performs an
unsafe memory copy. This results in a stack overflow condition which
can be leveraged to execute arbitrary code.

-- Vendor Response:
Apache has issued an update to correct this vulnerability. More details
can be found at:

http://tomcat.apache.org/connectors-doc/miscellaneous/changelog.html

-- Disclosure Timeline:
2007.02.16 - Vulnerability reported to vendor
2007.02.26 - Digital Vaccine released to TippingPoint customers
2007.03.02 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by an anonymous researcher.

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, a division of 3Com, The Zero Day Initiative
(ZDI) represents a best-of-breed model for rewarding security
researchers for responsibly disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is used.
3Com does not re-sell the vulnerability details or any exploit code.
Instead, upon notifying the affected product vendor, 3Com provides its
customers with zero day protection through its intrusion prevention
technology. Explicit details regarding the specifics of the
vulnerability are not exposed to any parties until an official vendor
patch is publicly available. Furthermore, with the altruistic aim of
helping to secure a broader user base, 3Com provides this vulnerability
information confidentially to security vendors (including competitors)
who have a vulnerability protection or mitigation product.

 
 


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