fetchmail 6.3.5 and 6.3.6 before 6.3.6-rc4, when refusing a message delivered via the mda option, allows remote attackers to cause a denial of service (crash) via unknown vectors that trigger a NULL pointer dereference when calling the (1) ferror or (2) fflush functions.
fedoranews.org/cms/node/2429
fetchmail.berlios.de/fetchmail-SA-2006-03.txt
osvdb.org/31836
secunia.com/advisories/23631
secunia.com/advisories/23804
secunia.com/advisories/23838
secunia.com/advisories/23923
secunia.com/advisories/24151
security.gentoo.org/glsa/glsa-200701-13.xml
securitytracker.com/id?1017479
slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.517995
www.novell.com/linux/security/advisories/2007_4_sr.html
www.openpkg.com/security/advisories/OpenPKG-SA-2007.004.html
www.securityfocus.com/archive/1/456114/100/0/threaded
www.securityfocus.com/bid/21902
www.trustix.org/errata/2007/0007
www.vupen.com/english/advisories/2007/0087
www.vupen.com/english/advisories/2007/0088