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Category:   Application (Web Server/CGI)  >   Compaq Secure Web Server Vendors:   HPE
(HP Issues Fix for CSWS) Apache ap_resolve_env() Buffer Overflow in Reading Configuration Files May Let Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1011992
SecurityTracker URL:  http://securitytracker.com/id/1011992
CVE Reference:   CVE-2004-0747   (Links to External Site)
Date:  Oct 29 2004
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 6.3.2a
Description:   A vulnerability was reported in Apache in the processing of configuration and access control files. A local user may be able to execute arbitrary code. HP's Secure Web Server is affected.

The Swedish IT Incident Centre (SITIC) reported that a local user can create a specially crafted '.htaccess' or 'httpd.conf' file to trigger a buffer overflow in Apache. The overflow occurs in the expansion of environment variables contained in the files. The overflow resides in the ap_resolve_env() function in 'server/util.c'.

A local user with the ability to create a malicious '.htaccess' file may be able to gain elevated privileges on the target system.

Ulf Harnhammar is credited with discovering this flaw.

Impact:   A local user may be able to gain the privileges of the web server process.
Solution:   HP has provided a patched version of the Secure Web Server (6.3.2a) for Tru64 UNIX, available at:

http://h30097.www3.hp.com/internet/download.htm

HP plans to include the fix in the future mainstream version 6.4 of HP Internet Express for Tru64UNIX (IX).

Vendor URL:  www.hp.com/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (Tru64)

Message History:   This archive entry is a follow-up to the message listed below.
Sep 16 2004 Apache ap_resolve_env() Buffer Overflow in Reading Configuration Files May Let Local Users Gain Elevated Privileges



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