Multiple vulnerabilities were discovered and corrected in fetchmail:

fetchmail 4.6.3 through 6.3.16, when debug mode is enabled, does
not properly handle invalid characters in a multi-character locale,
which allows remote attackers to cause a denial of service (memory
consumption and application crash) via a crafted (1) message header or
(2) POP3 UIDL list (CVE-2010-1167). NOTE: This vulnerability did not
affect Mandriva Linux 2010.2.

fetchmail 5.9.9 through 6.3.19 does not properly limit the wait
time after issuing a (1) STARTTLS or (2) STLS request, which allows
remote servers to cause a denial of service (application hang)
by acknowledging the request but not sending additional packets
(CVE-2011-1947).

Packages for 2009.0 are provided as of the Extended Maintenance
Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149&products_id=490

The updated packages have been upgraded to the 6.3.20 version which
is not vulnerable to these issues.