Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tomcat | >= 8.5.0, <= 8.5.37 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00090.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00013.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00054.html
- http://www.securityfocus.com/bid/107674
- https://access.redhat.com/errata/RHSA-2019:3929
- https://access.redhat.com/errata/RHSA-2019:3931
- https://lists.apache.org/thread.html/158ab719cf60448ddbb074798f09152fdb572fc8f78
- https://lists.apache.org/thread.html/1dd0a59c1295cc08ce4c9e7edae5ad2268acc9ba55a
- https://lists.apache.org/thread.html/4c438fa4c78cb1ce8979077f668ab7145baf83e7c59
- https://lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3
- https://lists.apache.org/thread.html/7bb193bc68b28d21ff1c726fd38bea164deb6333b59
- https://lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77
- https://lists.apache.org/thread.html/9fe25f98bac6d66f8a663a15c37a98bc2d8f8bbed1d
- https://lists.apache.org/thread.html/a7a201bd23e67fd3326c9b22b814dd0537d3270b3b5
- https://lists.apache.org/thread.html/ac0185ce240a711b542a55bccf9349ab0c2f343d70c
FAQ
What is CVE-2019-0199?
CVE-2019-0199 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 rea...
How severe is CVE-2019-0199?
CVE-2019-0199 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-0199?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Tomcat.