CVE-2018-11054
📋 TL;DR
CVE-2018-11054 is an integer overflow vulnerability in RSA BSAFE Micro Edition Suite that allows remote attackers to send malicious ASN.1 data to potentially cause a Denial of Service. This affects systems using RSA BSAFE Micro Edition Suite version 4.1.6 for cryptographic operations. Organizations using this library in their applications or devices are vulnerable.
💻 Affected Systems
- RSA BSAFE Micro Edition Suite
📦 What is this software?
Bsafe by Dell
Communications Ip Service Activator by Oracle
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Communications Ip Service Activator by Oracle
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Retail Predictive Application Server by Oracle
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⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or service disruption leading to extended downtime of applications relying on RSA BSAFE for cryptographic operations.
Likely Case
Service disruption or application crash requiring restart, potentially causing temporary loss of availability for affected services.
If Mitigated
Minimal impact with proper network segmentation and input validation preventing malicious ASN.1 data from reaching vulnerable components.
🎯 Exploit Status
Exploitation requires sending specially crafted ASN.1 data to vulnerable systems, but no public proof-of-concept has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 4.1.6 (check specific vendor updates)
Vendor Advisory: https://www.oracle.com/security-alerts/cpuapr2020.html
Restart Required: Yes
Instructions:
1. Identify all systems using RSA BSAFE Micro Edition Suite 4.1.6. 2. Apply vendor patches or upgrade to a fixed version. 3. Restart affected applications/services. 4. Verify the fix is applied.
🔧 Temporary Workarounds
Network Filtering
allImplement network filtering to block or inspect ASN.1 data sent to vulnerable systems.
Input Validation
allAdd additional input validation layers before ASN.1 data reaches the RSA BSAFE library.
🧯 If You Can't Patch
- Isolate vulnerable systems in segmented network zones with strict access controls.
- Implement application-level firewalls or WAF rules to filter suspicious ASN.1 payloads.
🔍 How to Verify
Check if Vulnerable:
Check application dependencies or system libraries for RSA BSAFE Micro Edition Suite version 4.1.6.Check Version:
Check application documentation or system package manager for RSA BSAFE version.Verify Fix Applied:
Verify the RSA BSAFE library version is updated to a version after 4.1.6 and test ASN.1 parsing functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes or abnormal termination logs related to cryptographic operations
- Error logs mentioning ASN.1 parsing failures or integer overflow
Network Indicators:
- Unusual volume of ASN.1 encoded data sent to systems using RSA BSAFE
- Network traffic patterns targeting cryptographic services
SIEM Query:
source="application_logs" AND ("RSA BSAFE" OR "ASN.1") AND ("crash" OR "overflow" OR "denial of service")🔗 References
- http://seclists.org/fulldisclosure/2018/Aug/46
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- http://seclists.org/fulldisclosure/2018/Aug/46
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
