Buffer overflows, format string vulnerabilities, DoS confitions.
vulners.com/securityvulns/securityvulns:doc:11964
vulners.com/securityvulns/securityvulns:doc:11965
vulners.com/securityvulns/securityvulns:doc:12065
vulners.com/securityvulns/securityvulns:doc:12074
vulners.com/securityvulns/securityvulns:doc:12385