SARA / Free Tools / CVE / CVE-2019-0199

CVE-2019-0199 — The HTTP/2 implementation in Apache Tomcat 9

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 ut

CVSS
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EPSS
66.24% (top 1.50%)
CWE
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Published
2019-04-10T14:21:50.000Z
Last modified
2024-08-04T17:44:15.322Z
CVSS vector
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01What is this 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…

02Affected products

VendorProductVersions
na / Apache TomcatApache Tomcat 9.0.0.M1 to 9.0.14, 8.5.0 to 8.5.37

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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