CVE-2007-2519

Directory traversal vulnerability in the installer in PEAR 1.0 through
1.5.3 allows user-assisted remote attackers to overwrite arbitrary files
via a … (dot dot) sequence in the (1) install-as attribute in the file
element in package.xml 1.0 or the (2) as attribute in the install element
in package.xml 2.0. NOTE: it could be argued that this does not cross
privilege boundaries in typical installations, since the code being
installed could perform the same actions.