CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
55.7%
Severity: Medium
Date : 2020-06-28
CVE-ID : CVE-2020-11996
Package : tomcat8
Type : denial of service
Remote : Yes
Link : https://security.archlinux.org/AVG-1197
The package tomcat8 before version 8.5.56-1 is vulnerable to denial of
service.
Upgrade to 8.5.56-1.
The problem has been fixed upstream in version 8.5.56.
None.
A denial of service has been found in Apache Tomcat before 9.0.36 and
8.5.56, where a specially crafted sequence of HTTP/2 requests could
trigger high CPU usage for several seconds. If a sufficient number of
such requests were made on concurrent HTTP/2 connections, the server
could become unresponsive.
A remote attacker might be able to cause a denial of service via a
specially crafted sequence of HTTP/2 requests.
https://www.openwall.com/lists/oss-security/2020/06/25/6
https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.36
https://github.com/apache/tomcat/commit/9a0231683a77e2957cea0fdee88b193b30b0c976
https://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.56
https://github.com/apache/tomcat/commit/c8acd2ab7371e39aeca7c306f3b5380f00afe552
https://security.archlinux.org/CVE-2020-11996
github.com/apache/tomcat/commit/9a0231683a77e2957cea0fdee88b193b30b0c976
github.com/apache/tomcat/commit/c8acd2ab7371e39aeca7c306f3b5380f00afe552
security.archlinux.org/AVG-1197
security.archlinux.org/CVE-2020-11996
tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.56
tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.36
www.openwall.com/lists/oss-security/2020/06/25/6
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
55.7%