CVE-2021-20556: IBM Cognos Controller information disclosure
First published: Fri May 03 2024(Updated: )
IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 could allow a remote user to enumerate usernames due to differentiating error messages on existing usernames. IBM X-Force ID: 199181.
Credit: psirt@us.ibm.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| IBM Cognos Controller | =10.4.1 | |
| IBM Cognos Controller | =10.4.2 | |
| IBM Cognos Controller | =11.0.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-20556?
CVE-2021-20556 has a medium severity rating due to the potential for user enumeration.
How do I fix CVE-2021-20556?
To fix CVE-2021-20556, update IBM Cognos Controller to the latest version that addresses this vulnerability.
What versions of IBM Cognos Controller are affected by CVE-2021-20556?
CVE-2021-20556 affects IBM Cognos Controller versions 10.4.1, 10.4.2, and 11.0.0.
What could an attacker achieve by exploiting CVE-2021-20556?
An attacker may exploit CVE-2021-20556 to enumerate valid usernames, leading to potential further attacks.
Is CVE-2021-20556 a local or remote vulnerability?
CVE-2021-20556 is classified as a remote vulnerability.
- agent/references
- agent/type
- agent/first-publish-date
- agent/title
- agent/description
- agent/severity
- agent/author
- agent/event
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/weakness
- agent/softwarecombine
- agent/tags
- agent/source
- vendor/ibm
- canonical/ibm cognos controller
- version/ibm cognos controller/10.4.1
- version/ibm cognos controller/10.4.2
- version/ibm cognos controller/11.0.0