thttpd 2.25b0 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-4491
• http://www.securityfocus.com/archive/1/508830/100/0/threaded
• http://www.ush.it/team/ush/hack_httpd_escape/adv.txt
• http://seclists.org/fulldisclosure/2023/Nov/13
• http://packetstormsecurity.com/files/175949/m-privacy-TightGate-Pro-Code-Execution-Insecure-Permissions.html