The escape_dangerous_chars function in CGI::Lite 2.0 and earlier does not correctly remove special characters including (1) "" (backslash), (2) "?", (3) "~" (tilde), (4) "^" (carat), (5) newline, or (6) carriage return, which could allow remote attackers to read or write arbitrary files, or execute arbitrary commands, in shell scripts that rely on CGI::Lite to filter such dangerous inputs.

References

• https://nvd.nist.gov/vuln/detail/CVE-2003-1365
• https://exchange.xforce.ibmcloud.com/vulnerabilities/11308
• http://archives.neohapsis.com/archives/vulnwatch/2003-q1/0065.html
• http://search.cpan.org/~smylers/CGI-Lite-2.02/Lite.pm
• http://securityreason.com/securityalert/3237
• http://use.perl.org/~cbrooks/journal/10542
• http://www.securityfocus.com/archive/1/311414
• http://www.securityfocus.com/bid/6833