Exposure of Sensitive Information to an Unauthorized Actor in Apache Tomcat
If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-13943US | medium4.3 | — | ||
If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connect… | ||||
references
External citations — patches, advisories, analysis.
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00002.htmlWEB
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00021.htmlWEB
- https://github.com/apache/tomcat/commit/1bbc650cbc3f08d85a1ec6d803c47ae53a84f3bbWEB
- https://github.com/apache/tomcat/commit/55911430df13f8c9998fbdee1f9716994d2db59bWEB
- https://github.com/apache/tomcat/commit/9d7def063b47407a09a2f9202beed99f4dcb292aWEB
- https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3EWEB
- https://lists.debian.org/debian-lts-announce/2020/10/msg00019.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2020-13943ADVISORY
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