CVE-2019-16792

Summary

Waitress through version 1.3.1 allows request smuggling by sending the Content-Length header twice. Waitress would header fold a double Content-Length header and due to being unable to cast the now comma separated value to an integer would set the Content-Length to 0 internally. If two Content-Length headers are sent in a single request, Waitress would treat the request as having no body, thereby treating the body of the request as a new request in HTTP pipelining. This issue is fixed in Waitress 1.4.0.

Affected Software

VendorProductVersion RangeStatus
PylonsWaitress<= 1.3.1 <= 1.3.1affected

Weaknesses

  • CWE-444: CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

ADP Enrichment

CVE Program Container

Additional References

References