fetchmail 6.3.8 and earlier, when running in -v -v (aka verbose) mode, allows remote attackers to cause a denial of service (crash and persistent mail failure) via a malformed mail message with long headers, which triggers an erroneous dereference when using vsnprintf to format log messages.
lists.apple.com/archives/security-announce/2009/Feb/msg00000.html
secunia.com/advisories/30742
secunia.com/advisories/30895
secunia.com/advisories/31262
secunia.com/advisories/31287
secunia.com/advisories/33937
slackware.com/security/viewer.php?l=slackware-security&y=2008&m=slackware-security.495740
support.apple.com/kb/HT3438
wiki.rpath.com/wiki/Advisories:rPSA-2008-0235
www.fetchmail.info/fetchmail-SA-2008-01.txt
www.mandriva.com/security/advisories?name=MDVSA-2008:117
www.openwall.com/lists/oss-security/2008/06/13/1
www.openwall.com/lists/oss-security/2021/08/09/1
www.securityfocus.com/archive/1/493391/100/0/threaded
www.securityfocus.com/archive/1/494865/100/0/threaded
www.securityfocus.com/bid/29705
www.securitytracker.com/id?1020298
www.vupen.com/english/advisories/2008/1860/references
www.vupen.com/english/advisories/2009/0422
bugzilla.novell.com/show_bug.cgi?id=354291
exchange.xforce.ibmcloud.com/vulnerabilities/43121
issues.rpath.com/browse/RPL-2623
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10950
www.redhat.com/archives/fedora-package-announce/2008-June/msg01091.html
www.redhat.com/archives/fedora-package-announce/2008-June/msg01095.html