CVE-2021-33037
high-risk
Published 2021-07-12
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.
Do I need to act?
~
1.9% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10
Medium
NETWORK
/ LOW complexity
Affected Products (20)
Tomee
Graph Server And Client
Hospitality Cruise Shipboard Property Management System
References (32)
Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10366
Third Party Advisory
https://security.gentoo.org/glsa/202208-34
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210827-0007/
Third Party Advisory
https://www.debian.org/security/2021/dsa-4952
Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10366
and 12 more references
50
/ 100
high-risk
Severity
21/34 · High
Exploitability
5/34 · Minimal
Exposure
24/34 · High