CRLF injection vulnerability in the tornado.web.RequestHandler.set_header function in Tornado before 2.2.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via crafted input.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-2374
• http://openwall.com/lists/oss-security/2012/05/18/12
• http://www.openwall.com/lists/oss-security/2012/05/18/6
• http://www.tornadoweb.org/documentation/releases/v2.2.1.html
• tornadoweb/tornado@1ae91f6
• https://web.archive.org/web/20140720192646/http://secunia.com/advisories/49185
• https://web.archive.org/web/20200229124524/http://www.securityfocus.com/bid/53612