MySQL before 4.0.20 allows remote attackers to cause a denial of service (application crash) via a MATCH AGAINST query with an opening double quote but no closing double quote.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17768
http://www.trustix.net/errata/2004/0054/
http://www.novell.com/linux/security/advisories/2004_01_sr.html
http://www.gentoo.org/security/en/glsa/glsa-200410-22.xml