CVE-2021-47821
📋 TL;DR
CVE-2021-47821 is a denial of service vulnerability in RarmaRadio 2.72.8 where attackers can crash the application by overflowing network configuration fields with large character buffers. This affects all users running the vulnerable version of RarmaRadio, potentially disrupting audio streaming services.
💻 Affected Systems
- RarmaRadio
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete application crash leading to service disruption, requiring manual restart and potentially causing data loss or corruption of configuration files.
Likely Case
Application instability and crash, interrupting audio streaming functionality until the application is manually restarted.
If Mitigated
No impact if the vulnerability is patched or workarounds are implemented to prevent buffer overflow.
🎯 Exploit Status
Exploit requires access to the application's network configuration interface. Proof of concept involves pasting 100,000 character buffers into multiple network settings fields.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.73 or later
Vendor Advisory: http://www.raimersoft.com/
Restart Required: Yes
Instructions:
1. Download latest version from official website. 2. Install over existing installation. 3. Restart RarmaRadio service.
🔧 Temporary Workarounds
Restrict Access to Configuration Interface
allLimit network access to RarmaRadio configuration interface to trusted users only.
Input Validation
allImplement input validation to reject excessively long strings in network configuration fields.
🧯 If You Can't Patch
- Isolate RarmaRadio instance on separate network segment with restricted access
- Implement monitoring for application crashes and restart automation
🔍 How to Verify
Check if Vulnerable:
Check RarmaRadio version in Help > About menu. If version is 2.72.8, system is vulnerable.Check Version:
Check Help > About menu in RarmaRadio applicationVerify Fix Applied:
Verify version is 2.73 or later in Help > About menu after patching.📡 Detection & Monitoring
Log Indicators:
- Application crash logs
- Unexpected termination events
- Error messages related to buffer overflow
Network Indicators:
- Multiple large data inputs to configuration interface
- Unusual network traffic patterns to RarmaRadio ports
SIEM Query:
EventID: 1000 OR EventID: 1001 Source: RarmaRadio.exe