IBM Cognos Controller 10.4.1/10.4.2/11.0.0 response discrepancy

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in IBM Cognos Controller 10.4.1/10.4.2/11.0.0. The affected element is an unknown function. Such manipulation leads to response discrepancy. This vulnerability is referenced as CVE-2021-20556. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in IBM Cognos Controller 10.4.1/10.4.2/11.0.0. It has been rated as problematic. Affected by this issue is an unknown function. The manipulation with an unknown input leads to a response discrepancy vulnerability. Using CWE to declare the problem leads to CWE-204. The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at ibm.com. This vulnerability is handled as CVE-2021-20556 since 12/17/2020. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (199181). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Response discrepancy
CWE: CWE-204 / CWE-203 / CWE-200
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/17/2020 🔍
05/03/2024 +1232 days 🔍
05/03/2024 +0 days 🔍
01/08/2025 +250 days 🔍

Sourcesinfo

Vendor: ibm.com

Advisory: ibm.com
Status: Confirmed

CVE: CVE-2021-20556 (🔍)
GCVE (CVE): GCVE-0-2021-20556
GCVE (VulDB): GCVE-100-263060
X-Force: 199181

Entryinfo

Created: 05/03/2024 20:10
Updated: 01/08/2025 04:47
Changes: 05/03/2024 20:10 (63), 01/08/2025 04:47 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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