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USN-862-1: PHP vulnerabilities

26 November 2009

PHP vulnerabilities

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Releases

Packages

Details

Maksymilian Arciemowicz discovered that PHP did not properly validate
arguments to the dba_replace function. If a script passed untrusted input
to the dba_replace function, an attacker could truncate the database. This
issue only applied to Ubuntu 6.06 LTS, 8.04 LTS, and 8.10. (CVE-2008-7068)

It was discovered that PHP's php_openssl_apply_verification_policy
function did not correctly handle SSL certificates with zero bytes in the
Common Name. A remote attacker could exploit this to perform a
machine-in-the-middle attack to view sensitive information or alter
encrypted communications. (CVE-2009-3291)

It was discovered that PHP did not properly handle certain malformed images
when being parsed by the Exif module. A remote attacker could exploit this
flaw and cause the PHP server to crash, resulting in a denial of service.
(CVE-2009-3292)

Grzegorz Stachowiak discovered that PHP did not properly enforce
restrictions in the tempnam function. An attacker could exploit this issue
to bypass safe_mode restrictions. (CVE-2009-3557)

Grzegorz Stachowiak discovered that PHP did not properly enforce
restrictions in the posix_mkfifo function. An attacker could exploit this
issue to bypass open_basedir restrictions. (CVE-2009-3558)

Bogdan Calin discovered that PHP did not limit the number of temporary
files created when handling multipart/form-data POST requests. A remote
attacker could exploit this flaw and cause the PHP server to consume all
available resources, resulting in a denial of service. (CVE-2009-4017)

ATTENTION: This update changes previous PHP behaviour by limiting the
number of files in a POST request to 50. This may be increased by adding a
"max_file_uploads" directive to the php.ini configuration file.

It was discovered that PHP did not properly enforce restrictions in the
proc_open function. An attacker could exploit this issue to bypass
safe_mode_protected_env_vars restrictions and possibly execute arbitrary
code with application privileges. (CVE-2009-4018)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.10
Ubuntu 9.04
Ubuntu 8.10
Ubuntu 8.04
Ubuntu 6.06

In general, a standard system upgrade is sufficient to effect the
necessary changes.