parse-packet.c in GnuPG (gpg) 1.4.3 and 1.9.20, and earlier versions, allows remote attackers to cause a denial of service (gpg crash) and possibly overwrite memory via a message packet with a large length (long user ID string), which could lead to an integer overflow, as demonstrated using the --no-armor option.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10089
https://exchange.xforce.ibmcloud.com/vulnerabilities/27245
http://www.vupen.com/english/advisories/2006/2450
http://www.securityfocus.com/bid/18554
http://www.securityfocus.com/archive/1/438751/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2006-0571.html
http://www.openpkg.com/security/advisories/OpenPKG-SA-2006.010.html
http://www.novell.com/linux/security/advisories/2006_38_security.html
http://www.novell.com/linux/security/advisories/2006_18_sr.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:110
http://www.debian.org/security/2006/dsa-1115
http://www.debian.org/security/2006/dsa-1107
http://support.avaya.com/elmodocs2/security/ASA-2006-167.htm
http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.457382
http://securitytracker.com/id?1016519
http://secunia.com/advisories/21585
http://secunia.com/advisories/21143
http://secunia.com/advisories/21137
http://secunia.com/advisories/21135
http://secunia.com/advisories/21063
http://secunia.com/advisories/20968
http://secunia.com/advisories/20899
http://secunia.com/advisories/20881
http://secunia.com/advisories/20829
http://secunia.com/advisories/20811
http://secunia.com/advisories/20801
http://secunia.com/advisories/20783
http://seclists.org/lists/fulldisclosure/2006/May/0789.html
http://seclists.org/lists/fulldisclosure/2006/May/0782.html
http://seclists.org/lists/fulldisclosure/2006/May/0774.html
http://cvs.gnupg.org/cgi-bin/viewcvs.cgi/trunk/g10/parse-packet.c?rev=4157&r1=4141&r2=4157