SynopsisThe remote Debian host is missing a security-related update.
DescriptionStephane Chazelas discovered that the cronjob of the PHP 5 package in Debian suffers from a race condition which might be used to remove arbitrary files from a system (CVE-2011-0441 ).
When upgrading your php5-common package take special care to acceptthe changes to the /etc/cron.d/php5 file. Ignoring them would leave the system vulnerable.
SolutionUpgrade the php5 packages.
For the oldstable distribution (lenny), this problem has been fixed in version 5.2.6.dfsg.1-1+lenny10.
For the stable distribution (squeeze), this problem has been fixed in version 5.3.3-7+squeeze1.
Additionally, the following vulnerabilities have also been fixed in the oldstable distribution (lenny) :
- CVE-2010-3709 Maksymilian Arciemowicz discovered that the ZipArchive class may dereference a NULL pointer when extracting comments from a ZIP archive, leading to application crash and possible denial of service.
Stefan Neufeind discovered that the FILTER_VALIDATE_EMAIL filter does not correctly handle long, to be validated, strings. Such crafted strings may lead to denial of service because of high memory consumption and application crash.
It was discovered that PHP does not correctly handle certain UTF-8 sequences and may be used to bypass XSS protections.
Mateusz Kocielski discovered that the IMAP extension may try to free already freed memory when processing user credentials, leading to application crash and possibly arbitrary code execution.