The installer in PEAR before 1.9.2 allows local users to overwrite arbitrary files via a symlink attack on the package.xml file, related to the (1) download_dir, (2) cache_dir, (3) tmp_dir, and (4) pear-build-download directories, a different vulnerability than CVE-2007-2519.
Exploitability
AV:LAC:MAu:NImpact
C:NI:PA:P3.3/AV:L/AC:M/Au:N/C:N/I:P/A:P