CVE-2021-33037Not scoredCWE-444

CVE-2021-33037: Incorrect Transfer-Encoding handling with HTTP/1.0

Apache Software Foundation · Apache Tomcat

Vendor fix available · Affected: Apache Software Foundation Apache Tomcat · Exploitation: likely to be exploited (10% or more)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

74.7%probability of exploitation in the next 30 days

99th percentile

050100

Higher than 99% of scored CVEs

Not scored yet. The CVE record carries no CVSS score.

DescriptionCVE.org

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 products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Apache Software Foundation · Apache TomcatApache Tomcat 10 10.0.0-M1 to 10.0.6; Apache Tomcat 9 9.0.0.M1 to 9.0.46; Apache Tomcat 8 8.5.0 to 8.5.66

On the Atlas

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Open the Atlas

Exploitation: Likely to be exploited (10% or more). EPSS gives it a 10% or higher chance of exploitation in the next 30 days.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Inconsistent Interpretation of HTTP Requests · Injection and Smuggling
Vendor: Apache Software Foundation
Published: July 2021
Band: Likely to be exploited (10% or more), July 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2021-33037 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.

References

4 more references are in the CVE record.