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Category:   Application (Web Server/CGI)  >   Apache HTTPD Vendors:   Apache Software Foundation
(HP Issues Fix for HP-UX) Apache mod_proxy_ajp HTTP Processing Error Lets Remote Users Deny Service
SecurityTracker Alert ID:  1026100
SecurityTracker URL:  http://securitytracker.com/id/1026100
CVE Reference:   CVE-2011-3348   (Links to External Site)
Date:  Sep 27 2011
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.2.21
Description:   A vulnerability was reported in Apache mod_proxy_ajp. A remote user can cause denial of service conditions.

When mod_proxy_ajp is used together with mod_proxy_balancer, a remote user can send specially crafted HTTP requests to place the backend server in an error state until the retry timeout expires.

Impact:   A remote user can cause the backend server to remain in an error state until the retry timeout expires.
Solution:   HP has issued a fix for HP-UX.

The HP advisory is available at:

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03025215

Vendor URL:  httpd.apache.org/ (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  UNIX (HP/UX)
Underlying OS Comments:  B.11.23, B.11.31

Message History:   This archive entry is a follow-up to the message listed below.
Sep 15 2011 Apache mod_proxy_ajp HTTP Processing Error Lets Remote Users Deny Service



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