CVE-2019-0199
high-risk
Published 2019-04-10
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.
Do I need to act?
!
65.6% chance of exploitation in next 30 days
EPSS score — higher than 34% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (20)
Affected Vendors
References (70)
and 50 more references
65
/ 100
high-risk
Severity
26/34 · High
Exploitability
19/34 · Moderate
Exposure
20/34 · Moderate