It's possible to read first line from any file with PROSTARTUP variable. Buffer overflow on DLC variable.
vulners.com/securityvulns/securityvulns:doc:4349
vulners.com/securityvulns/securityvulns:doc:4382
vulners.com/securityvulns/securityvulns:doc:4394
vulners.com/securityvulns/securityvulns:doc:4696
vulners.com/securityvulns/securityvulns:doc:4697
vulners.com/securityvulns/securityvulns:doc:4711