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The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
Sun Cobalt PHP SafeMode Vulnerability
[Sun Alert ID: 46724]
May 7, 2003 18:00 GMT Number N-091
______________________________________________________________________________
PROBLEM: Sun has identified a vulnerability in PHP SafeMode with the
privileges of the HTTP process. The HTTP process normally runs
as the unprivileged uid 'nobody' (uid 60001).
PLATFORM: Sun Cobalt RaQs and Qubes
DAMAGE: Exploiting this vulnerability could allow local or remote
attackers the ability to execute arbitrary code.
SOLUTION: Apply available patches.
______________________________________________________________________________
VULNERABILITY The risk is HIGH. PHP 4.0.5 through 4.1.0 in safe mode does not
ASSESSMENT: properly cleanse the 5th parameter to the mail() function,
which allows local users and possibly remote attackers to
execute arbitrary commands via shell metacharacters.
______________________________________________________________________________
LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/n-091.shtml
ORIGINAL BULLETIN: http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%
2F46724&zone_32=category%3Asecurity
PATCHES: http://sunsolve.sun.com/cobalt/
http://ftp.cobalt.sun.com/pub/packages/raq4/eng/RaQ4-All-
Security-2.0.1-15959.pkg
http://ftp.cobalt.sun.com/pub/packages/qube3/ml/Qube3-All-
Security-4.0.1-15959.pkg
http://ftp.cobalt.sun.com/pub/packages/raq550/all/RaQ550-
All-Security-0.0.1-15959.pkg
http://ftp.cobalt.sun.com/pub/packages/raqxtr/eng/RaQXTR-
All-Security-1.0.1-15959.pkg
ftp://ftp.cobalt.sun.com/pub/products/sunlinux/5.0/en/
updates/i386/update_5_0_3/
______________________________________________________________________________
[***** Start Sun Alert ID: 46724 *****]
Sun(sm) Alert Notification
Sun Alert ID: 46724
Synopsis: The PHP on Sun/Cobalt Platforms Have Exploitable Vulnerabilities
Category: Security
Product: Sun Cobalt RaQs and Qubes
BugIDs: 15959
Avoidance: Workaround, Patch
State: Resolved
Date Released: 28-Aug-2002, 06-May-2003
Date Closed: 06-May-2003
Date Modified: 06-May-2003
1. Impact
A local or remote unprivileged user may be able to execute arbitrary code on Sun Cobalt
systems due to a vulnerability in PHP SafeMode with the privileges of the HTTP process.
The HTTP process normally runs as the unprivileged uid 'nobody' (uid 60001). In order
for a remote unprivileged user to exploit this issue, the existing PHP pages must use a
variable as the fifth parameter in the mail() command. The ability to execute arbitrary
code as the unprivileged uid 'nobody' may lead to modified Web content, denial of
service, or further compromise.
Please see the Common Vulnerabilities and Exposures project at http://cve.mitre.org and
reference CAN-2001-1246 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1246.
An additional reference is http://www.iss.net/security_center/static/6787.php.
2. Contributing Factors
This issue can occur in the following releases:
2800 Workgroup NTT/KOBE(2800WGJ-KOBE)
mod_php3-3.0.7-1C3j.mips.rpm
mod_php3-doc-3.0.7-1C3j.mips.rpm
RaQ4 no raid(3001R)
php-4.0.1-C1.i386.rpm
php-devel-4.0.1-C1.i386.rpm
RaQ4 Japanese no raid(3001R-ja)
php-4.0.1-C1.i386.rpm
php-devel-4.0.1-C1.i386.rpm
RaQ4 RAID(3100R)
php-4.0.1-C1.i386.rpm
php-devel-4.0.1-C1.i386.rpm
RaQ4 Japanese RAID(3100R-ja)
php-4.0.1-C1.i386.rpm
php-devel-4.0.1-C1.i386.rpm
RaQ XTR(3500R)
php-4.0.3pl1-C1r5.i386.rpm
php-devel-4.0.3pl1-C1r5.i386.rpm
RaQ XTR Japanese(3500R-ja)
php-4.0.3pl1-C1r5.i386.rpm
php-devel-4.0.3pl1-C1r5.i386.rpm
Qube3(4000WG)
php-4.0.1-C7q3.i386.rpm
php-devel-4.0.1-C5q3.i386.rpm
Qube 3 Japanese(4000WGJ)
php-4.0.3pl1-C1q3.i386.rpm
php-devel-4.0.3pl1-C1q3.i386.rpm
Qube3 w/ Caching(4010WG)
php-4.0.1-C7q3.i386.rpm
php-devel-4.0.1-C5q3.i386.rpm
Qube3 Japanese w/ Caching(4010WGJ)
php-4.0.3pl1-C1q3.i386.rpm
php-devel-4.0.3pl1-C1q3.i386.rpm
Control Station Production(4100CS)
php-4.0.3pl1-C1r6.i386.rpm
php-devel-4.0.3pl1-C1r6.i386.rpm
RaQ 550 (4100R)
php-devel-4.0.6-C4.i386.rpm
php-4.0.6-C4.i386.rpm
Qube3 w/ Caching and RAID(4100WG)
php-4.0.1-C7q3.i386.rpm
php-devel-4.0.1-C5q3.i386.rpm
Qube3 Japanese w/ Caching and RAID(4100WGJ)
php-4.0.3pl1-C1q3.i386.rpm
php-devel-4.0.3pl1-C1q3.i386.rpm
Sun LX50 (Sun Linux 5.0)
php-4.0.6-12.i386.rpm
php-devel-4.0.6-12.i386.rpm
php-imap-4.0.6-12.i386.rpm
php-ldap-4.0.6-12.i386.rpm
php-mysql-4.0.6-12.i386.rpm
php-odbc-4.0.6-12.i386.rpm
php-manual-4.0.6-12.noarch.rpm
Notes: PHP is an HTML-embedded scripting language commonly used with Apache. PHP
versions 4.0.5 through 4.1.0 in safe mode do not properly cleanse the 5th parameter to
the mail() function. This vulnerability allows local users and possibly remote attackers
to execute arbitrary commands via shell metacharacters.
3. Symptoms
Unusual entries in the web server logs could indicate that someone is attempting to gain
entry through this issue. Any abnormal and/or unauthorized system activity, including,
but not limited to, defaced web pages, unknown user accounts appearing on the system,
and abnormal network traffic or listening TCP/UDP ports.
Solution Summary Top
4. Relief/Workaround
Until fixes for these vulnerabilities can be applied, disable all applications (as
mentioned above in Contributing Factors) that use vulnerable implementations of PHP.
5. Resolution
This issue is addressed in the following releases:
Cobalt platform
Patches are available for all affected Cobalt platforms at:
http://sunsolve.sun.com/cobalt/.
For RaQ 4:
http://ftp.cobalt.sun.com/pub/packages/raq4/eng/RaQ4-All-Security-2.0.1-15959.pkg
Qube 3:
http://ftp.cobalt.sun.com/pub/packages/qube3/ml/Qube3-All-Security-4.0.1-15959.pkg
RaQ 550:
http://ftp.cobalt.sun.com/pub/packages/raq550/all/RaQ550-All-Security-0.0.1-15959.pkg
RaQ XTR:
http://ftp.cobalt.sun.com/pub/packages/raqxtr/eng/RaQXTR-All-Security-1.0.1-15959.pkg
Sun LX50 (Sun Linux 5.0):
ftp://ftp.cobalt.sun.com/pub/products/sunlinux/5.0/en/updates/i386/update_5_0_3/
Change History
06-May-2003:
State: Resolved
Updated Resolution section
This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert
notification may contain information provided by third parties. The issues described in
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notification may only be used for the purposes contemplated by these agreements.
[***** End Sun Alert ID: 46724 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Sun Microsystems for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
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