Security
Security
Several vulnerabilities were found and fixed in PHP, ranging from an information leak and a safe_mode restriction bypass to a potential remote execution of arbitrary code.
| Package | dev-php/php on all architectures |
|---|---|
| Affected versions | < 4.3.10 |
| Unaffected versions | >= 4.3.10 |
| Package | dev-php/mod_php on all architectures |
|---|---|
| Affected versions | < 4.3.10 |
| Unaffected versions | >= 4.3.10 |
| Package | dev-php/php-cgi on all architectures |
|---|---|
| Affected versions | < 4.3.10 |
| Unaffected versions | >= 4.3.10 |
PHP is a general-purpose scripting language widely used to develop web-based applications. It can run inside a web server using the mod_php module or the CGI version of PHP, or can run stand-alone in a CLI.
Stefan Esser and Marcus Boerger reported several different issues in the unserialize() function, including serious exploitable bugs in the way it handles negative references (CAN-2004-1019).
Stefan Esser also discovered that the pack() and unpack() functions are subject to integer overflows that can lead to a heap buffer overflow and a heap information leak. Finally, he found that the way multithreaded PHP handles safe_mode_exec_dir restrictions can be bypassed, and that various path truncation issues also allow to bypass path and safe_mode restrictions.
Ilia Alshanetsky found a stack overflow issue in the exif_read_data() function (CAN-2004-1065). Finally, Daniel Fabian found that addslashes and magic_quotes_gpc do not properly escape null characters and that magic_quotes_gpc contains a bug that could lead to one level directory traversal.
These issues could be exploited by a remote attacker to retrieve web server heap information, bypass safe_mode or path restrictions and potentially execute arbitrary code with the rights of the web server running a PHP application.
There is no known workaround at this time.
All PHP users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-php/php-4.3.10"
All mod_php users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-php/mod_php-4.3.10"
All php-cgi users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-php/php-cgi-4.3.10"
Release date
December 19, 2004
Latest revision
May 22, 2006: 02
Severity
high
Exploitable
remote
Bugzilla entries