CVE 2009-4111
Argument injection vulnerability in Mail/sendmail.php in the Mail package 1.1.14, 1.2.0b2, and possibly other versions for PEAR allows remote attackers to read and write arbitrary files via a crafted $recipients parameter, and possibly other parameters, a different vulnerability than CVE-2009-4023.
See the 
CVE page on Mitre.org
for more details.
