vsftpd before 1.2.2, when under heavy load, allows attackers to cause a denial of service (crash) via a SIGCHLD signal during a malloc or free call, which is not re-entrant.
ftp://vsftpd.beasts.org/users/cevans/untar/vsftpd-1.2.2/Changelog
bugzilla.redhat.com/bugzilla/show_bug.cgi?id=119136
rhn.redhat.com/errata/RHBA-2004-164.html
secunia.com/advisories/11680
secunia.com/advisories/11736
www.osvdb.org/6306
www.securityfocus.com/bid/10394
exchange.xforce.ibmcloud.com/vulnerabilities/16222
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11049