fetchmail before 6.3.1 and before 6.2.5.5, when configured for multidrop mode, allows remote attackers to cause a denial of service (application crash) by sending messages without headers from upstream mail servers.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9659
https://exchange.xforce.ibmcloud.com/vulnerabilities/23713
http://wwwnew.mandriva.com/security/advisories?name=MDKSA-2005:236
http://www.vupen.com/english/advisories/2006/3101
http://www.vupen.com/english/advisories/2005/2996
http://www.securityfocus.com/bid/19289
http://www.securityfocus.com/bid/15987
http://www.securityfocus.com/archive/1/435197/100/0/threaded
http://www.securityfocus.com/archive/1/420098/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2007-0018.html
http://www.debian.org/security/2005/dsa-939
http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.443499
http://securitytracker.com/id?1015383
http://secunia.com/advisories/24284
http://secunia.com/advisories/24007
http://secunia.com/advisories/21253
http://secunia.com/advisories/18895
http://secunia.com/advisories/18463
http://secunia.com/advisories/18433
http://secunia.com/advisories/18266
http://secunia.com/advisories/18231
http://secunia.com/advisories/18172