CVE-2019-0199
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apache Tomcat
PublishedApr 10, 2019
First seenApr 10, 2019
How to fix
Update
- org.apache.tomcat.embed:tomcat-embed-core9.0.16, 8.5.38 or later
- org.apache.tomcat:tomcat-coyote9.0.16, 8.5.38 or later
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQTZ5BJ5F4KV6N53SGNKSW3UY5DBIQ46/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NPHQEL5AQ6LZSZD2Y6TYZ4RC3WI7NXJ3/
- access.redhat.com/errata/RHSA-2019:3929
- access.redhat.com/errata/RHSA-2019:3931
- debian.org/security/2019/dsa-4596
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache tomcat | 8.5.0 ≤ v ≤ 8.5.37, 9.0.1 ≤ v ≤ 9.0.14, 9.0.0 | — |
| org.apache.tomcat.embed:tomcat-embed-coreMaven | 9.0.0 ≤ v < 9.0.16, 8.0.0 ≤ v < 8.5.38 | 9.0.16, 8.5.38 |
| org.apache.tomcat:tomcat-coyoteMaven | 9.0.0 ≤ v < 9.0.16, 8.0.0 ≤ v < 8.5.38 | 9.0.16, 8.5.38 |
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