GLSA-200412-14 : PHP: Multiple vulnerabilities
Critical Nessus Plugin ID 16001
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200412-14 (PHP: Multiple vulnerabilities)
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.
SolutionAll 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'