Integer signedness error in rfc2231_get_param from strings.c in PINE before 4.58 allows remote attackers to execute arbitrary code via an email that causes an out-of-bounds array access using a negative number.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A503
https://euvd.enisa.europa.eu/vulnerability/EUVD-2003-0712
http://www.redhat.com/support/errata/RHSA-2003-274.html
http://www.redhat.com/support/errata/RHSA-2003-273.html
http://www.idefense.com/advisory/09.10.03.txt
http://lists.grok.org.uk/pipermail/full-disclosure/2003-September/009850.html