Several security issues were fixed in PHP.
It was discovered that PHP incorrectly handled certain Tidy::diagnose operations on invalid objects. A remote attacker could use this flaw to cause PHP to crash, leading to a denial of service. (CVE-2012-0781)
19 June 2012
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in PHP.
It was discovered that PHP incorrectly handled certain Tidy::diagnose operations on invalid objects. A remote attacker could use this flaw to cause PHP to crash, leading to a denial of service. (CVE-2012-0781)
It was discovered that PHP incorrectly handled certain multi-file upload filenames. A remote attacker could use this flaw to cause a denial of service, or to perform a directory traversal attack. (CVE-2012-1172)
Rubin Xu and Joseph Bonneau discovered that PHP incorrectly handled certain Unicode characters in passwords passed to the crypt() function. A remote attacker could possibly use this flaw to bypass authentication. (CVE-2012-2143)
It was discovered that a Debian/Ubuntu specific patch caused PHP to incorrectly handle empty salt strings. A remote attacker could possibly use this flaw to bypass authentication. This issue only affected Ubuntu 10.04 LTS and Ubuntu 11.04. (CVE-2012-2317)
It was discovered that PHP, when used as a stand alone CGI processor for the Apache Web Server, did not properly parse and filter query strings. This could allow a remote attacker to execute arbitrary code running with the privilege of the web server, or to perform a denial of service. Configurations using mod_php5 and FastCGI were not vulnerable. (CVE-2012-2335, CVE-2012-2336)
Alexander Gavrun discovered that the PHP Phar extension incorrectly handled certain malformed TAR files. A remote attacker could use this flaw to perform a denial of service, or possibly execute arbitrary code. (CVE-2012-2386)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
Vulmon