CVE-2019-0199
Apache Tomcat Denial of Service vulnerability
7.5
HIGH
CVSS 3.1
EPSS 65.6%
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.
How to fix CVE-2019-0199
To remediate CVE-2019-0199, upgrade the affected package to a fixed version below.
- —upgrade to 9.0.16-1 or later
- —upgrade to 9.0.16 or later
- —upgrade to 9.0.16 or later
Is CVE-2019-0199 being exploited?
Likely — EPSS is 65.6%, placing CVE-2019-0199 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (3)
- from 0, < 9.0.16-1
- >= 9.0.0, < 9.0.16
- >= 9.0.0, < 9.0.16
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |