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High severityNVD Advisory· Published Dec 3, 2020· Updated Feb 13, 2025

Apache Tomcat: Request header mix-up between HTTP/2 streams

CVE-2020-17527

Description

While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
org.apache.tomcat:tomcat-coyoteMaven
>= 10.0.0-M1, < 10.0.0-M1010.0.0-M10
org.apache.tomcat:tomcat-coyoteMaven
>= 9.0.0-M1, < 9.0.409.0.40
org.apache.tomcat:tomcat-coyoteMaven
>= 8.5.0, < 8.5.608.5.60

Affected products

21

Patches

Vulnerability mechanics

References

49

News mentions

0

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