Apache Tomcat Denial of Service vulnerability
The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2019-0199US | high7.5 | — | ||
The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep stre… | ||||
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references
External citations — patches, advisories, analysis.
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00090.htmlWEB
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00013.htmlWEB
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00054.htmlWEB
- https://access.redhat.com/errata/RHSA-2019:3929WEB
- https://access.redhat.com/errata/RHSA-2019:3931WEB
- https://github.com/apache/tomcatPACKAGE
- https://lists.apache.org/thread.html/158ab719cf60448ddbb074798f09152fdb572fc8f781e70a56118d1a%40%3Cdev.tomcat.apache.org%3EWEB
- https://lists.apache.org/thread.html/158ab719cf60448ddbb074798f09152fdb572fc8f781e70a56118d1a@%3Cdev.tomcat.apache.org%3EWEB
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