High severity · published Apr 10, 2019
CVE-2019-0199
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…
7.5
CVSS
72.9%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)72.9% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
Tomcat · Apache
8.5.0 through 8.5.37; 9.0.1 through 9.0.14; 9.0.0; 9.0.0; 9.0.0; 9.0.0; +17 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-0199
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-0199
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00090.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00013.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00054.html
www.securityfocus.com
http://www.securityfocus.com/bid/107674
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:3929
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:3931
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