The customDictionaryOpen spell method in the JavaScript API in Adobe Reader 9.1, 8.1.4, 7.1.1, and earlier on Linux and UNIX allows remote attackers to cause a denial of service (memory corruption) or execute arbitrary code via a PDF file that triggers a call to this method with a long string in the second argument.
https://www.exploit-db.com/exploits/8570
https://exchange.xforce.ibmcloud.com/vulnerabilities/50146
http://www.us-cert.gov/cas/techalerts/TA09-133B.html
http://www.securitytracker.com/id?1022139
http://www.redhat.com/support/errata/RHSA-2009-0478.html
http://www.kb.cert.org/vuls/id/970180
http://www.adobe.com/support/security/bulletins/apsb09-06.html
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=926953
http://security.gentoo.org/glsa/glsa-200907-06.xml
http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00001.html
http://blogs.adobe.com/psirt/2009/05/adobe_reader_issue_update.html
http://blogs.adobe.com/psirt/2009/04/update_on_adobe_reader_issue.html