Mandriva Linux Security Advisory - A security hole was discovered in all versions of the PEAR Installer (http://pear.php.net/PEAR). The security hole is the most serious hole found to date in the PEAR Installer, and would allow a malicious package to install files anywhere in the filesystem. The vulnerability only affects users who are installing an intentionally created package with a malicious intent. Because the package is easily traced to its source, this is most likely to happen if a hacker were to compromise a PEAR channel server and alter a package to install a backdoor. In other words, it must be combined with other exploits to be a problem.
d5ddc79329de98184813b2b9b77553d5bda0fbf71ca44cd3fcd83d64e7f553a3