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Security Bulletin: Apache Tomcat as used by IBM QRadar SIEM is vulnerable to information disclosure (CVE-2020-13943)

Security Bulletin


Apache Tomcat as used by IBM QRadar SIEM is vulnerable to information disclosure

Vulnerability Details

CVEID:   CVE-2020-13943
DESCRIPTION:   Apache Tomcat could allow a remote attacker to obtain sensitive information, caused by a flaw when HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection. By sending a specially-crafted HTTP request, an attacker could exploit this vulnerability to see the responses for unexpected resources, and use this information to launch further attacks against the affected system.
CVSS Base score: 5.3
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

IBM QRadar 7.3.0 to 7.3.3 Patch 7

IBM QRadar 7.4.0 to 7.4.2 Patch 2

Workarounds and Mitigations


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Change History

4 May 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location


[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSBQAC","label":"IBM Security QRadar SIEM"},"Component":"","Platform":[{"code":"PF016","label":"Linux"}],"Version":"7.3, 7.4","Edition":"All Editions","Line of Business":{"code":"LOB24","label":"Security Software"}}]

Document Information

Modified date:
04 May 2021