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Category:   Application (Web Server/CGI)  >   Apache HTTPD Vendors:   Apache Software Foundation
(Red Hat Issues Fix) Apache HTTPD scoreboard Protection Flaw Lets Local Users Terminate Arbitrary Processes
SecurityTracker Alert ID:  1018305
SecurityTracker URL:  http://securitytracker.com/id/1018305
CVE Reference:   CVE-2007-3304   (Links to External Site)
Date:  Jun 26 2007
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.3.x, 2.2.x
Description:   A vulnerability was reported in Apache HTTPD. A local user can cause denial of service conditions.

The server does not verify that a process is actually an Apache child process before sending signals to the process. A local user with the ability to run scripts can modify the scoreboard arrays to reference arbitrary process IDs and cause arbitrary processes to be terminated.

The vendor was notified on May 16, 2006.

PSNC Security Team discovered this vulnerability.

Impact:   A local user with privileges to run scripts on the target system can terminate arbitrary processes on the target system.
Solution:   Red Hat has released a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2007-0532.html

Vendor URL:  httpd.apache.org/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  2.1

Message History:   This archive entry is a follow-up to the message listed below.
Jun 26 2007 Apache HTTPD scoreboard Protection Flaw Lets Local Users Terminate Arbitrary Processes



 Source Message Contents

Subject:  [RHSA-2007:0532-01] Moderate: apache security update


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

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Moderate: apache security update
Advisory ID:       RHSA-2007:0532-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2007-0532.html
Issue date:        2007-06-26
Updated on:        2007-06-26
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2007-3304 CVE-2006-5752 
- ---------------------------------------------------------------------

1. Summary:

Updated Apache httpd packages that correct two security issues are now
available for Red Hat Enterprise Linux 2.1.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386

3. Problem description:

The Apache HTTP Server is a popular Web server.

The Apache HTTP Server did not verify that a process was an Apache child
process before sending it signals. A local attacker who has the ability to
run scripts on the Apache HTTP Server could manipulate the scoreboard and
cause arbitrary processes to be terminated, which could lead to a denial of
service. (CVE-2007-3304) 

A flaw was found in the Apache HTTP Server mod_status module. Sites with
the server-status page publicly accessible and ExtendedStatus enabled were
vulnerable to a cross-site scripting attack. On Red Hat Enterprise Linux
the server-status page is not enabled by default and it is best practice to
not make this publicly available. (CVE-2006-5752)

Users of Apache should upgrade to these updated packages, which contain
backported patches to correct these issues. Users should restart Apache
after installing this update.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  

This update is available via Red Hat Network.  Details on how to use 
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

5. Bug IDs fixed (http://bugzilla.redhat.com/):

245111 - CVE-2007-3304 httpd scoreboard lack of PID protection
245112 - CVE-2006-5752 httpd mod_status XSS

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/apache-1.3.27-12.ent.src.rpm
737514615921dc02ea4309ad12f91f80  apache-1.3.27-12.ent.src.rpm

i386:
4661f8345564a7b429a0c6b84df699a9  apache-1.3.27-12.ent.i386.rpm
cf02487246160118259738e8ec6b112d  apache-devel-1.3.27-12.ent.i386.rpm
1c3d08027ffb5cdab74af4daa37d7058  apache-manual-1.3.27-12.ent.i386.rpm

ia64:
4981b35e225ad4b660e910c831776305  apache-1.3.27-12.ent.ia64.rpm
42d858d5d916dbed7c550db5c5b0d07b  apache-devel-1.3.27-12.ent.ia64.rpm
7b25f3454a76869ca91cbb6ed319e75f  apache-manual-1.3.27-12.ent.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/apache-1.3.27-12.ent.src.rpm
737514615921dc02ea4309ad12f91f80  apache-1.3.27-12.ent.src.rpm

ia64:
4981b35e225ad4b660e910c831776305  apache-1.3.27-12.ent.ia64.rpm
42d858d5d916dbed7c550db5c5b0d07b  apache-devel-1.3.27-12.ent.ia64.rpm
7b25f3454a76869ca91cbb6ed319e75f  apache-manual-1.3.27-12.ent.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/apache-1.3.27-12.ent.src.rpm
737514615921dc02ea4309ad12f91f80  apache-1.3.27-12.ent.src.rpm

i386:
4661f8345564a7b429a0c6b84df699a9  apache-1.3.27-12.ent.i386.rpm
cf02487246160118259738e8ec6b112d  apache-devel-1.3.27-12.ent.i386.rpm
1c3d08027ffb5cdab74af4daa37d7058  apache-manual-1.3.27-12.ent.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/apache-1.3.27-12.ent.src.rpm
737514615921dc02ea4309ad12f91f80  apache-1.3.27-12.ent.src.rpm

i386:
4661f8345564a7b429a0c6b84df699a9  apache-1.3.27-12.ent.i386.rpm
cf02487246160118259738e8ec6b112d  apache-devel-1.3.27-12.ent.i386.rpm
1c3d08027ffb5cdab74af4daa37d7058  apache-manual-1.3.27-12.ent.i386.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3304
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5752
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2007 Red Hat, Inc.
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