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Category:   Application (Generic)  >   CA ARCserve Backup Vendors:   CA
(CA Issues Fix for CA ARCserve Backup) Apache ap_resolve_env() Buffer Overflow in Reading Configuration Files May Let Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1022149
SecurityTracker URL:  http://securitytracker.com/id/1022149
CVE Reference:   CVE-2004-0747   (Links to External Site)
Date:  Apr 30 2009
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 11.5; only on certain platforms
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. CA ARCserve Backup 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:   CA has issued the following patches for CA ARCserve Backup, which is affected by this vulnerability.

CA ARCserve Backup r11.5 Solaris:
RO06786

CA ARCserve Backup r11.5 Tru64:
RO06788

CA ARCserve Backup r11.5 HP-UX:
RO06789

CA ARCserve Backup r11.5 AIX:
RO06791

The CA advisory is available at:

https://support.ca.com/irj/portal/anonymous/phpsupcontent?contentID=205147

Cause:   Boundary error
Underlying OS:  UNIX (AIX), UNIX (HP/UX), UNIX (Solaris - SunOS), 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



 Source Message Contents

Subject:  CA20090429-01: CA ARCserve Backup Apache HTTP Server Multiple Vulnerabilities


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Title: CA20090429-01: CA ARCserve Backup Apache HTTP Server 
Multiple Vulnerabilities


CA Advisory Reference: CA20090429-01


CA Advisory Date: 2009-04-29


Reported By:
Apache Software Foundation
David Endler of iDefense
Ulf Harnhammar for SITIC, Swedish IT Incident Centre


Impact: A remote attacker can exploit a buffer overflow to gain 
apache privileges, or cause a denial of service.


Summary: CA ARCserve Backup on Solaris, Tru64, HP-UX, and AIX 
contains multiple vulnerabilities in the Apache HTTP Server 
version as shipped with ARCserve Backup. CA has issued updates 
that contain version 2.0.63 of the Apache HTTP Server to address 
the vulnerabilities. Refer to the References section for a list of 
resolved issues by CVE identifier.


Mitigating Factors: None


Severity: CA has given these vulnerabilities a Medium risk rating.


Affected Products:
CA ARCserve Backup r11.5 Solaris
CA ARCserve Backup r11.5 Tru64
CA ARCserve Backup r11.5 HP-UX
CA ARCserve Backup r11.5 AIX


Non-Affected Products:
CA ARCserve Backup r11.5 Windows
CA ARCserve Backup r11.5 Linux


Affected Platforms:
Solaris
Tru64
HP-UX
AIX


Status and Recommendation:
CA has issued the following patches to address the 
vulnerabilities.

CA ARCserve Backup r11.5 Solaris:
RO06786

CA ARCserve Backup r11.5 Tru64:
RO06788

CA ARCserve Backup r11.5 HP-UX:
RO06789

CA ARCserve Backup r11.5 AIX:
RO06791


How to determine if you are affected:

1. From the command line, run the following to print the version 
   of the Apache HTTP Server included with ARCserve Backup:

      $BAB_HOME/httpd/httpd -v

      Note: On HP-UX the shared library path needs to be modified 
            prior to running the httpd command:

      SHLIB_PATH=$SHLIB_PATH:$BAB_HOME/httpd/lib
      export SHLIB_PATH

2. If the displayed version is less than 2.0.63, then the 
   installation may be vulnerable.


Workaround: 
As a workaround solution, disable the Apache HTTP Server with the 
"stopgui" command. To re-enable the server, run "startgui".

Stopping the Apache HTTP Server will prevent the ARCserve user 
from performing GUI operations. Most of the operations provided by 
the GUI can be accomplished via the command line.

Alternatively, restrict remote network access to reduce exposure.


References (URLs may wrap):
CA Support:
https://support.ca.com/
CA20090429-01: Security Notice for CA ARCserve Backup Apache HTTP 
   Server
https://support.ca.com/irj/portal/anonymous/phpsupcontent?contentID=2051
47
Solution Document Reference APARs:
RO06786, RO06788, RO06789, RO06791
CA Security Response Blog posting:
CA20090429-01: CA ARCserve Backup Apache HTTP Server Multiple 
   Vulnerabilities
http://community.ca.com/blogs/casecurityresponseblog/archive/2009/04/29.
asp
x
Reported By: 
Apache Software Foundation
David Endler of iDefense
Ulf Harnhammar for SITIC, Swedish IT Incident Centre
CVE References:
CVE-2004-0747
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0747
CVE-2003-0132
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0132
OSVDB References: Pending
http://osvdb.org/


Changelog for this advisory:
v1.0 - Initial Release


Customers who require additional information should contact CA
Technical Support at https://support.ca.com.

For technical questions or comments related to this advisory, 
please send email to vuln AT ca DOT com.

If you discover a vulnerability in CA products, please report your 
findings to the CA Product Vulnerability Response Team.
https://support.ca.com/irj/portal/anonymous/phpsupcontent?contentID=1777
82


Regards,
Ken Williams, Director ; 0xE2941985
CA Product Vulnerability Response Team


CA, 1 CA Plaza, Islandia, NY 11749
	
Contact http://www.ca.com/us/contact/
Legal Notice http://www.ca.com/us/legal/
Privacy Policy http://www.ca.com/us/privacy/
Copyright (c) 2009 CA. All rights reserved.

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