Date: Fri, 1 Mar 2002 01:10:44 -0500 (EST)
From: EnGarde Secure Linux <[email protected]>
To: [email protected], [email protected]Subject: [ESA-20020301-006] 'php, mod_php' MIME parsing vulnerabilities
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| EnGarde Secure Linux Security Advisory March 01, 2002 |
| http://www.engardelinux.org/ ESA-20020301-006 |
| |
| Packages: php, mod_php |
| Summary: Several flaws in PHP's MIME parsing. |
+------------------------------------------------------------------------+
EnGarde Secure Linux is a secure distribution of Linux that features
improved access control, host and network intrusion detection, Web
based secure remote management, complete e-commerce using AllCommerce,
and integrated open source security tools.
OVERVIEW
- --------
There is a vulnerability in PHP's MIME data parsing code which may
allow an attacker to execute arbitrary code as the web server user.
DETAIL
- ------
Stefan Esser of the e-matters team has found several flaws in PHP's
MIME parsing code, the code that is responsible for handling file
uploads as per RFC1867. If a server has file_uploads turned on in
its php.ini then a remote attacker may execute arbitrary code
as the web server user (webd).
For more information on this bug please refer to the original advisory
by e-matters and the recent follow-up advisory by CERT:
http://security.e-matters.de/advisories/012002.htmlhttp://www.cert.org/advisories/CA-2002-05.html
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2002-0081 to this issue.
SOLUTION
- --------
All users should upgrade to the most recent version as outlined in
this advisory.
Guardian Digital recently made available the Guardian Digital Secure
Update, a means to proactively keep systems secure and manage
system software. EnGarde users can automatically update their system
using the Guardian Digital WebTool secure interface.
If choosing to manually upgrade this package, updates can be
obtained from:
ftp://ftp.engardelinux.org/pub/engarde/stable/updates/http://ftp.engardelinux.org/pub/engarde/stable/updates/
Before upgrading the package, the machine must either:
a) be booted into a "standard" kernel; or
b) have LIDS disabled.
To disable LIDS, execute the command:
# /sbin/lidsadm -S -- -LIDS_GLOBAL
To install the updated package, execute the command:
# rpm -Uvh <filename>
You must now update the LIDS configuration by executing the command:
# /usr/sbin/config_lids.pl
To re-enable LIDS (if it was disabled), execute the command:
# /sbin/lidsadm -S -- +LIDS_GLOBAL
To verify the signatures of the updated packages, execute the command:
# rpm -Kv <filename>
UPDATED PACKAGES
- ----------------
These updated packages are for EnGarde Secure Linux 1.0.1 (Finestra).
Source Packages:
SRPMS/php-4.0.6-1.0.18.src.rpm
MD5 Sum: e590a2f6b9c7e80e90b718e324a5f6ba
Binary Packages:
i386/mod_php-4.0.6-1.0.18.i386.rpm
MD5 Sum: bcc84d1f09d0c3ae0df569a5d918c37e
i386/php-4.0.6-1.0.18.i386.rpm
MD5 Sum: 4d385118b7cbae08731b56f587ae97f2
i686/mod_php-4.0.6-1.0.18.i686.rpm
MD5 Sum: 2b425ef98818857067512357c43f6234
i686/php-4.0.6-1.0.18.i686.rpm
MD5 Sum: 1fc1cd3a39439bfb66cc63e6152d1ffc
REFERENCES
- ----------
Guardian Digital's public key:
http://ftp.engardelinux.org/pub/engarde/ENGARDE-GPG-KEY
Credit for the discovery of this bug goes to:
Stefan Esser <[email protected]>
PHP's Official Web Site:
http://www.php.net/
Security Contact: [email protected]
EnGarde Advisories: http://www.engardelinux.org/advisories.html
- --------------------------------------------------------------------------
$Id: ESA-20020301-006-php,v 1.3 2002/03/01 06:03:33 rwm Exp $
- --------------------------------------------------------------------------
Author: Ryan W. Maple, <[email protected]>
Copyright 2002, Guardian Digital, Inc.
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