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Gentoo Linux Security Advisory GLSA 200504-15 |
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http://security.gentoo.org/ |
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|
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Severity: High |
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Title: PHP: Multiple vulnerabilities |
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Date: April 18, 2005 |
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Bugs: #87517 |
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ID: 200504-15 |
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|
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Synopsis |
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======== |
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|
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Several vulnerabilities were found and fixed in PHP image handling |
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functions, potentially resulting in Denial of Service conditions or |
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the remote execution of arbitrary code. |
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|
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Background |
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========== |
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|
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PHP is a general-purpose scripting language widely used to develop |
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web-based applications. It can run inside a web server using the |
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mod_php module or the CGI version of PHP, or can run stand-alone in a |
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CLI. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 dev-php/php < 4.3.11 >= 4.3.11 |
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2 dev-php/mod_php < 4.3.11 >= 4.3.11 |
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3 dev-php/php-cgi < 4.3.11 >= 4.3.11 |
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------------------------------------------------------------------- |
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3 affected packages on all of their supported architectures. |
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------------------------------------------------------------------- |
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|
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Description |
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=========== |
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|
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An integer overflow and an unbound recursion were discovered in the |
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processing of Image File Directory tags in PHP's EXIF module |
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(CAN-2005-1042, CAN-2005-1043). Furthermore, two infinite loops have |
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been discovered in the getimagesize() function when processing IFF or |
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JPEG images (CAN-2005-0524, CAN-2005-0525). |
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|
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Impact |
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====== |
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|
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A remote attacker could craft an image file with a malicious EXIF IFD |
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tag, a large IFD nesting level or invalid size parameters and send it |
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to a web application that would process this user-provided image using |
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one of the affected functions. This could result in denying service on |
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the attacked server and potentially executing arbitrary code with the |
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rights of the web server. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. |
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|
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Resolution |
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========== |
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|
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All PHP users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-php/php-4.3.11" |
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|
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All mod_php users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-php/mod_php-4.3.11" |
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|
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All php-cgi users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-php/php-cgi-4.3.11" |
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|
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References |
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========== |
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|
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[ 1 ] PHP 4.3.11 Release Announcement |
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http://www.php.net/release_4_3_11.php |
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[ 2 ] CAN-2005-0524 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0524 |
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[ 3 ] CAN-2005-0525 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0525 |
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[ 4 ] CAN-2005-1042 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1042 |
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[ 5 ] CAN-2005-1043 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1043 |
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|
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Availability |
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============ |
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|
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200504-15.xml |
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|
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Concerns? |
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========= |
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|
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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|
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Copyright 2005 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.0 |