Varnish 2.0.6 - 'Terminal Escape Sequence in Logs' Command Injection

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漏洞ID 1118898 漏洞类型 Input Validation Error
发布时间 2010-01-11 更新时间 2010-01-11
CVE编号 CVE-2009-4488 CNNVD-ID N/A
漏洞平台 Multiple CVSS评分 5.0
** DISPUTED ** 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."

Varnish is prone to a command-injection vulnerability because it fails to adequately sanitize user-supplied input in logfiles.

Attackers can exploit this issue to execute arbitrary commands in a terminal.

Varnish 2.0.6 is vulnerable; other versions may also be affected. 

The following example is available:

echo -en "GET /\x1b]2;owned?\x07\x0a\x0d\x0a\x0d" > payload
nc localhost 80 < payload
Varnish Varnish 2.0.6