CVE-2009-4488

Varnish 2.0.6 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. NOTE: the vendor disputes the significance of this report, stating that "This is not a security problem in Varnish or any other piece of software which writes a logfile. The real problem is the mistaken belief that you can cat(1) a random logfile to your terminal safely.

• CWE-20
• CWE-1284

• http://www.securityfocus.com/archive/1/508830/100/0/threaded
• http://www.securityfocus.com/bid/37713Exploit
• http://www.ush.it/team/ush/hack_httpd_escape/adv.txtExploit
• http://www.securityfocus.com/archive/1/508830/100/0/threaded
• http://www.securityfocus.com/bid/37713Exploit
• http://www.ush.it/team/ush/hack_httpd_escape/adv.txtExploit

Published

Jan 13, 2010

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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