CVE-2019-4730 – IBM Cognos Analytics 11.0 and 11.1 contains an ... (How to Fix)

Q: What is the severity of CVE-2019-4730?

CVE-2019-4730 has a CVSS score of 7.1 (HIGH). IBM Cognos Analytics 11.0 and 11.1 contains an XML External Entity (XXE) vulnerability that allows remote attackers to read arbitrary files from the server or cause denial of service through resource exhaustion. This affects organizations using vulnerable versions of IBM Cognos Analytics for business intelligence reporting.

📋 TL;DR

IBM Cognos Analytics 11.0 and 11.1 contains an XML External Entity (XXE) vulnerability that allows remote attackers to read arbitrary files from the server or cause denial of service through resource exhaustion. This affects organizations using vulnerable versions of IBM Cognos Analytics for business intelligence reporting.

💻 Affected Systems

Products:

IBM Cognos Analytics

Versions: 11.0 and 11.1

Operating Systems: All supported platforms

Default Config Vulnerable: ⚠️ Yes

Notes: All deployments processing XML data through vulnerable components are affected. The vulnerability exists in XML parsing functionality.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete server compromise through sensitive file disclosure (e.g., configuration files, credentials) leading to data breach and potential lateral movement within the network.

🟠

Likely Case

Unauthorized access to sensitive server files containing configuration data, credentials, or other business information.

🟢

If Mitigated

Limited impact with proper network segmentation and XML parsing restrictions, though some information disclosure may still occur.

🌐 Internet-Facing: HIGH - Remote attackers can exploit this without authentication if the vulnerable endpoint is exposed to the internet.

🏢 Internal Only: MEDIUM - Internal attackers or compromised internal systems could exploit this to escalate privileges or access sensitive data.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

XXE vulnerabilities are well-understood with readily available exploitation techniques. No specific public exploit code was found for this CVE, but general XXE techniques apply.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: IBM Cognos Analytics 11.1.7 FP3 and later, or apply interim fix as specified in IBM advisory

Vendor Advisory: https://www.ibm.com/support/pages/node/6451705

Restart Required: Yes

Instructions:

1. Review IBM advisory for specific patch requirements. 2. Apply the appropriate fix pack or interim fix. 3. Restart Cognos services. 4. Test functionality after patching.

🔧 Temporary Workarounds

Disable External Entity Processing

all

Configure XML parsers to disable external entity resolution

Configure XML parser settings: set features FEATURE_SECURE_PROCESSING = true, http://apache.org/xml/features/disallow-doctype-decl = true, http://xml.org/sax/features/external-general-entities = false, http://xml.org/sax/features/external-parameter-entities = false

Network Segmentation

all

Restrict access to Cognos Analytics endpoints

Configure firewall rules to limit access to Cognos ports (default 9300, 9301) to trusted networks only

🧯 If You Can't Patch

Implement strict network access controls to limit exposure of Cognos endpoints
Deploy web application firewall with XXE protection rules and monitor for exploitation attempts

🔍 How to Verify

Check if Vulnerable:

Check IBM Cognos Analytics version via Administration Console or by examining installation files. Versions 11.0.x or 11.1.x before 11.1.7 FP3 are vulnerable.

Check Version:

Check Cognos configuration: ${COGNOS_HOME}/cognos/c10/configuration/cogconfig.xml for version information, or use Administration Console

Verify Fix Applied:

Verify version is 11.1.7 FP3 or later, or confirm interim fix is applied per IBM advisory. Test XML processing functionality remains operational.

📡 Detection & Monitoring

Log Indicators:

Unusual XML parsing errors in application logs
Multiple large XML file processing attempts
Requests with DOCTYPE declarations or external entity references

Network Indicators:

HTTP requests containing XML with external entity references to Cognos endpoints
Outbound connections from Cognos server to unexpected external systems

SIEM Query:

source="cognos.log" AND ("DOCTYPE" OR "ENTITY" OR "SYSTEM") AND ("error" OR "exception")

📊 Metadata

CVE ID: CVE-2019-4730

CVSS v3 Score: 7.1 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

CWE: CWE-611

Published: June 1, 2021

Last Updated: November 21, 2024

🔗 References

https://exchange.xforce.ibmcloud.com/vulnerabilities/172533 VDB Entry,Vendor Advisory
https://security.netapp.com/advisory/ntap-20210622-0004/ Third Party Advisory
https://www.ibm.com/support/pages/node/6451705 Patch,Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/172533 VDB Entry,Vendor Advisory
https://security.netapp.com/advisory/ntap-20210622-0004/ Third Party Advisory
https://www.ibm.com/support/pages/node/6451705 Patch,Vendor Advisory

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