CVE-2021-33037

Summary

Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.

Affected Software

VendorProductVersion RangeStatus
Apache Software FoundationApache TomcatApache Tomcat 10 10.0.0-M1 to 10.0.6affected
Apache Software FoundationApache TomcatApache Tomcat 9 9.0.0.M1 to 9.0.46affected
Apache Software FoundationApache TomcatApache Tomcat 8 8.5.0 to 8.5.66affected

Weaknesses

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

ADP Enrichment

CVE Program Container

Additional References

References