Cross Site Scripting (XSS) Vulnerabilities in the Apache 1.3 and 2.0 "mod_imap" and "mod_status" Modules

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Cross Site Scripting (XSS) Vulnerabilities in the Apache 1.3 and 2.0 "mod_imap" and "mod_status" Modules

1. Impact

Two security vulnerabilities have been found in the Apache HTTP server which affect the Apache 2.0 web server bundled with Solaris 10 and the Apache 1.3 web server bundled with Solaris 8, Solaris 9 and Solaris 10.

The first issue, a Cross Site Scripting (CSS or XSS) vulnerability in the "mod_imap" Apache server module (CVE-2007-5000), may allow a local or remote unprivileged user to inject arbitrary web script or HTML. This may allow the unprivileged user to bypass access control and gain access to unauthorized data.

The second issue, a Cross Site Scripting (CSS or XSS) vulnerability in the "mod_status" Apache server module (CVE-2007-6388), may allow a local or remote unprivileged user to inject arbitrary web script or HTML. This may allow the unprivileged user to bypass access control and gain access to unauthorized data.

Additional information regarding these issues is available at:

2. Contributing Factors

These issues can occur in the following releases:

SPARC Platform

• Solaris 8 without patch 116973-07
• Solaris 9 without patch 113146-10
• Solaris 10 without patch 120543-11 and without patch 122911-11

x86 Platform

• Solaris 8 without patch 116974-07
• Solaris 9 without patch 114145-09
• Solaris 10 without patch 120544-11 and without patch 122912-11

Note 1: A system is only vulnerable to the described issues if the Apache 1.3 web server and/or Apache 2.0 web server has been configured and is running on the system.

The following command can be run to determine if the Apache 1.3 web server is currently running on the system:

$ /usr/bin/ps -ef | grep httpd
nobody 103892 102307 0 Jan 20 ? 0:27 /usr/apache/bin/httpd

The following SMF (smf(5)) command can be used to see if the Solaris 10 bundled Apache 2 web server service is enabled:

$ svcs svc:/network/http:apache2
STATE          STIME    FMRI\
disabled       Feb_02   svc:/network/http:apache2

Note 2: The mod_imap vulnerability (CVE-2007-5000) only affects systems which make use of the Apache Server Status module mod_imap.

To determine if this module is enabled, a command such as the following can be run for all of the configuration files that define the running Apache 1.3 and Apache 2 configuration:

$ egrep "imap-file|application/x-httpd-imap" /etc/apache/httpd.conf | grep map
AddType application/x-httpd-imap map

$ egrep "imap-file|application/x-httpd-imap" /etc/apache2/httpd.conf | grep map 
AddHandler imap file map

Note 3: The mod_status vulnerability (CVE-2007-6388) only affects systems which make use of the Apache Server Status module (mod_status).

To determine if this module is enabled, a command such as the following can be run for all of the configuration files that define the running Apache 1.3 and Apache 2 configuration:

$ grep SetHandler /etc/apache/httpd.conf | grep server-status 
SetHandler server-status

$ grep SetHandler /etc/apache2/httpd.conf | grep server-status 
SetHandler server-status

3. Symptoms

There are no predictable symptoms that would indicate the described issues have been exploited on a system.

4. Workaround

To avoid the mod_imap issue (CVE-2007-5000) from occurring, make sure that there is no activation of map files (see Note 2 in Section 2) in the Apache httpd.conf file.

To avoid the mod_status issue (CVE-2007-6388) from occurring, make sure that the "ExtendedStatus" entry in the Apache httpd.conf file is disabled.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

• Solaris 8 with patch 116973-07 or later
• Solaris 9 with patch 113146-10 or later
• Solaris 10 with patch 120543-11 or later and patch 122911-11 or later

x86 Platform

• Solaris 8 with patch 116974-07 or later
• Solaris 9 with patch 114145-09 or later
• Solaris 10 with patch 120544-11 or later and patch 122912-11 or later

For more information on Security Sun Alerts, see Technical Instruction ID 213557.

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Modification History

25-Apr-2008: Updated Contributing Factors and Resolution sections
28-Apr-2008: Updated Resolution section to add link for Security Technical Instruction doc
05-May-2008: Updated Contributing Factors and Resolution sections: RESOLVED

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