Cognos Controller Vulnerability Could Allow Username Enumeration
CVE-2021-20556

5.3MEDIUM

Key Information:

Vendor

IBM
Status
Cognos Controller
Vendor
CVE Published:
3 May 2024

What is CVE-2021-20556?

IBM Cognos Controller versions 10.4.1, 10.4.2, and 11.0.0 possess a security flaw that can be exploited by remote attackers to enumerate valid usernames. This occurs due to inconsistent error messages returned when users attempt to log in with non-existent usernames. Attackers can leverage these different messages to gain insights into which usernames are valid, potentially leading to unauthorized access or further attacks. Organizations utilizing these versions of IBM Cognos Controller should take precautionary measures to secure their applications against this vulnerability.

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Affected Version(s)

Cognos Controller 10.4.1, 10.4.2, 11.0.0

References

https://www.ibm.com/support/pages/node/7149876
vendor-advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/199181
vdb-entry

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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