| 1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 2 |
Gentoo Linux Security Advisory GLSA 200407-13 |
| 3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 4 |
http://security.gentoo.org/ |
| 5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 6 |
|
| 7 |
Severity: High |
| 8 |
Title: PHP: Multiple security vulnerabilities |
| 9 |
Date: July 15, 2004 |
| 10 |
Bugs: #56985 |
| 11 |
ID: 200407-13 |
| 12 |
|
| 13 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 14 |
|
| 15 |
Synopsis |
| 16 |
======== |
| 17 |
|
| 18 |
Multiple security vulnerabilities, potentially allowing remote code |
| 19 |
execution, were found and fixed in PHP. |
| 20 |
|
| 21 |
Background |
| 22 |
========== |
| 23 |
|
| 24 |
PHP is a general-purpose scripting language widely used to develop |
| 25 |
web-based applications. It can run inside a web server using the |
| 26 |
mod_php module or the CGI version of PHP, or can run stand-alone in a |
| 27 |
CLI. |
| 28 |
|
| 29 |
Affected packages |
| 30 |
================= |
| 31 |
|
| 32 |
------------------------------------------------------------------- |
| 33 |
Package / Vulnerable / Unaffected |
| 34 |
------------------------------------------------------------------- |
| 35 |
1 dev-php/php <= 4.3.7-r1 >= 4.3.8 |
| 36 |
2 dev-php/mod_php <= 4.3.7-r1 >= 4.3.8 |
| 37 |
3 dev-php/php-cgi <= 4.3.7-r1 >= 4.3.8 |
| 38 |
------------------------------------------------------------------- |
| 39 |
3 affected packages on all of their supported architectures. |
| 40 |
------------------------------------------------------------------- |
| 41 |
|
| 42 |
Description |
| 43 |
=========== |
| 44 |
|
| 45 |
Several security vulnerabilities were found and fixed in version 4.3.8 |
| 46 |
of PHP. The strip_tags() function, used to sanitize user input, could |
| 47 |
in certain cases allow tags containing \0 characters (CAN-2004-0595). |
| 48 |
When memory_limit is used, PHP might unsafely interrupt other functions |
| 49 |
(CAN-2004-0594). The ftok and itpc functions were missing safe_mode |
| 50 |
checks. It was possible to bypass open_basedir restrictions using |
| 51 |
MySQL's LOAD DATA LOCAL function. Furthermore, the IMAP extension was |
| 52 |
incorrectly allocating memory and alloca() calls were replaced with |
| 53 |
emalloc() for better stack protection. |
| 54 |
|
| 55 |
Impact |
| 56 |
====== |
| 57 |
|
| 58 |
Successfully exploited, the memory_limit problem could allow remote |
| 59 |
excution of arbitrary code. By exploiting the strip_tags vulnerability, |
| 60 |
it is possible to pass HTML code that would be considered as valid tags |
| 61 |
by the Microsoft Internet Explorer and Safari browsers. Using ftok, |
| 62 |
itpc or MySQL's LOAD DATA LOCAL, it is possible to bypass PHP |
| 63 |
configuration restrictions. |
| 64 |
|
| 65 |
Workaround |
| 66 |
========== |
| 67 |
|
| 68 |
There is no known workaround that would solve all these problems. All |
| 69 |
users are encouraged to upgrade to the latest available versions. |
| 70 |
|
| 71 |
Resolution |
| 72 |
========== |
| 73 |
|
| 74 |
All PHP, mod_php and php-cgi users should upgrade to the latest stable |
| 75 |
version: |
| 76 |
|
| 77 |
# emerge sync |
| 78 |
|
| 79 |
# emerge -pv ">=dev-php/php-4.3.8" |
| 80 |
# emerge ">=dev-php/php-4.3.8" |
| 81 |
|
| 82 |
# emerge -pv ">=dev-php/mod_php-4.3.8" |
| 83 |
# emerge ">=dev-php/mod_php-4.3.8" |
| 84 |
|
| 85 |
# emerge -pv ">=dev-php/php-cgi-4.3.8" |
| 86 |
# emerge ">=dev-php/php-cgi-4.3.8" |
| 87 |
|
| 88 |
References |
| 89 |
========== |
| 90 |
|
| 91 |
[ 1 ] CAN-2004-0594 |
| 92 |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0594 |
| 93 |
[ 2 ] CAN-2004-0595 |
| 94 |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0595 |
| 95 |
[ 3 ] E-Matters Advisory 11/2004 |
| 96 |
http://security.e-matters.de/advisories/112004.html |
| 97 |
[ 4 ] E-Matters Advisory 12/2004 |
| 98 |
http://security.e-matters.de/advisories/122004.html |
| 99 |
|
| 100 |
Availability |
| 101 |
============ |
| 102 |
|
| 103 |
This GLSA and any updates to it are available for viewing at |
| 104 |
the Gentoo Security Website: |
| 105 |
|
| 106 |
http://security.gentoo.org/glsa/glsa-200407-13.xml |
| 107 |
|
| 108 |
Concerns? |
| 109 |
========= |
| 110 |
|
| 111 |
Security is a primary focus of Gentoo Linux and ensuring the |
| 112 |
confidentiality and security of our users machines is of utmost |
| 113 |
importance to us. Any security concerns should be addressed to |
| 114 |
security@g.o or alternatively, you may file a bug at |
| 115 |
http://bugs.gentoo.org. |
| 116 |
|
| 117 |
License |
| 118 |
======= |
| 119 |
|
| 120 |
Copyright 2004 Gentoo Foundation, Inc; referenced text |
| 121 |
belongs to its owner(s). |
| 122 |
|
| 123 |
The contents of this document are licensed under the |
| 124 |
Creative Commons - Attribution / Share Alike license. |
| 125 |
|
| 126 |
http://creativecommons.org/licenses/by-sa/1.0 |
Archives