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Security Bulletin: Apache Kafka as used by IBM QRadar SIEM is vulnerable to information disclosure (CVE-2021-38153, CVE-2018-17196)

Security Bulletin


Apache Kafka as used by IBM QRadar SIEM is vulnerable to information disclosure. IBM has addressed the relevant CVEs.

Vulnerability Details

CVEID:   CVE-2021-38153
DESCRIPTION:   Apache Kafka could allow a remote attacker to obtain sensitive information, caused by a timing attack flaw due to the use of "Arrays.equals" to validate a password or key. By utilizing brute-force attack techniques, an attacker could exploit this vulnerability to obtain credentials information, and use this information to launch further attacks against the affected system.
CVSS Base score: 7.5
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID:   CVE-2018-17196
DESCRIPTION:   Apache Kafka could allow a remote authenticated attacker to bypass security restrictions, caused by improper input validation. By sending a specially-crafted Produce request, an attacker could exploit this vulnerability to bypass transaction/idempotent ACL validation.
CVSS Base score: 4.3
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM QRadar SIEM v7.3All ApacheKafka versions before 7.3.0-QRADAR-PROTOCOL-ApacheKafka-7.3-20220429171209
IBM QRadar SIEM v7.4All ApacheKafka versions before 7.4.0-QRADAR-PROTOCOL-ApacheKafka-7.4-20220429171217
IBM QRadar SIEM v7.5All ApacheKafka versions before 7.5.0-QRADAR-PROTOCOL-ApacheKafka-7.5-20220429171113



IBM encourages customers to update their systems promptly.

See the Related Information section below for instructions on verifying your currently installed version.

IBM QRadar SIEM7.37.3.0-QRADAR-PROTOCOL-ApacheKafka-7.3-20220429171209
IBM QRadar SIEM7.47.4.0-QRADAR-PROTOCOL-ApacheKafka-7.4-20220429171217
IBM QRadar SIEM7.57.5.0-QRADAR-PROTOCOL-ApacheKafka-7.5-20220429171113

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

07 Jun 2022: 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.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location


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Document Information

Modified date:
16 June 2022