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             AUSCERT External Security Bulletin Redistribution

Security Bulletin: IBM QRadar SIEM is vulnerable to an XML External Entity
                  Injection (XXE) attack (CVE-2021-20399)
                               27 July 2021


        AusCERT Security Bulletin Summary

Product:           IBM QRadar SIEM
Publisher:         IBM
Operating System:  Linux variants
Impact/Access:     Denial of Service        -- Existing Account
                   Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-20399  

Original Bulletin: 

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Security Bulletin: IBM QRadar SIEM is vulnerable to an XML External Entity
Injection (XXE) attack (CVE-2021-20399)

Document Information

Product:	       IBM QRadar SIEM
Software version:      7.3, 7.4
Operating system(s):   Linux
Document number:       6475263
Modified date:         26 July 2021


IBM QRadar SIEM is vulnerable to an XML External Entity Injection (XXE) attack
when processing XML data.

Vulnerability Details

CVEID:   CVE-2021-20399
DESCRIPTION:   IBM QRadar is vulnerable to an XML External Entity Injection
(XXE) attack when processing XML data. A remote attacker could exploit this
vulnerability to expose sensitive information or consume memory resources.
CVSS Base score: 7.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
196073 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L)

Affected Products and Versions

IBM QRadar SIEM 7.3.0 to 7.3.3 Patch 8
IBM QRadar SIEM 7.4.0 to 7.4.3 GA


QRadar / QRM / QVM / QRIF / QNI 7.3.3 Patch 9
QRadar / QRM / QVM / QRIF / QNI 7.4.3 Patch 1

Workarounds and Mitigations



John Zuccato, Rodney Ryan, Chris Shepherd, Vince Dragnea, Troy Fisher, Nathan
Roane, Elaheh Samani and Gabor Minyo from IBM X-Force Ethical Hacking Team

Change History

21 Jul 2021: Initial Publication

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