CVE-2020-10109

Name of the Vulnerable Software and Affected Versions Twisted Web versions 19.10.0 and earlier Twisted Web versions prior to 20.3.0

Description The issue is related to an HTTP request splitting vulnerability in Twisted Web. When a content-length and a chunked encoding header are present, the content-length takes precedence, and the remainder of the request body is interpreted as a pipelined request. This vulnerability is associated with insufficient input validation when processing HTTP headers, which could allow a remote attacker to cause a denial of service.

Recommendations For Twisted Web versions 19.10.0 and earlier, update to a version later than 19.10.0 to resolve the issue. For Twisted Web versions prior to 20.3.0, update to a version later than 20.3.0 to resolve the issue. As a temporary workaround, consider restricting the use of the content-length and chunked encoding headers in HTTP requests to minimize the risk of exploitation.