CVE-2022-46527 – CVE-2022-46527 is a buffer overflow vulnerabili... (How to Fix)

Q: What is the severity of CVE-2022-46527?

CVE-2022-46527 has a CVSS score of 7.5 (HIGH). CVE-2022-46527 is a buffer overflow vulnerability in the NFC data parser of ELSYS ERS 1.5 Sound v2.3.8. This allows attackers to execute arbitrary code or cause denial of service by sending specially crafted NFC data. Organizations using ELSYS ERS 1.5 Sound systems are affected.

📋 TL;DR

CVE-2022-46527 is a buffer overflow vulnerability in the NFC data parser of ELSYS ERS 1.5 Sound v2.3.8. This allows attackers to execute arbitrary code or cause denial of service by sending specially crafted NFC data. Organizations using ELSYS ERS 1.5 Sound systems are affected.

💻 Affected Systems

Products:

ELSYS ERS 1.5 Sound

Versions: v2.3.8

Operating Systems: Embedded system specific to ELSYS devices

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects devices with NFC functionality enabled and running vulnerable firmware

📦 What is this software?

Ers 1.5 Firmware by Elsys

View all CVEs affecting Ers 1.5 Firmware →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, data theft, or device takeover

🟠

Likely Case

Denial of service causing device crashes or instability

🟢

If Mitigated

Limited impact with proper network segmentation and exploit prevention controls

🌐 Internet-Facing: MEDIUM - Requires NFC proximity or network access to NFC interface

🏢 Internal Only: MEDIUM - Internal attackers with NFC access could exploit

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Exploit requires NFC proximity or network access to NFC interface; public advisory includes technical details

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check with vendor for updated firmware

Vendor Advisory: https://www.elsys.se/en/ers-sound/

Restart Required: Yes

Instructions:

1. Contact ELSYS support for patched firmware. 2. Backup device configuration. 3. Apply firmware update via management interface. 4. Reboot device. 5. Verify update success.

🔧 Temporary Workarounds

Disable NFC functionality

all

Temporarily disable NFC data parsing if not required

Check device management interface for NFC disable option

Network segmentation

all

Isolate ELSYS devices on separate VLAN with restricted access

🧯 If You Can't Patch

Implement strict network access controls to limit NFC interface exposure
Monitor for unusual NFC data patterns or device crashes

🔍 How to Verify

Check if Vulnerable:

Check device firmware version via management interface or serial console

Check Version:

Check via device web interface or serial console commands specific to ELSYS

Verify Fix Applied:

Confirm firmware version is updated beyond v2.3.8 and test NFC functionality

📡 Detection & Monitoring

Log Indicators:

Device crash logs
NFC parser errors
Memory corruption warnings

Network Indicators:

Unusual NFC data traffic patterns
Multiple connection attempts to NFC interface

SIEM Query:

Search for device model:ELSYS AND (event_type:crash OR error_message:"buffer overflow" OR "NFC parser")

📊 Metadata

CVE ID: CVE-2022-46527

CVSS v3 Score: 7.5 (HIGH)

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

CWE: CWE-120

Published: September 1, 2023

Last Updated: November 21, 2024

🔗 References

https://github.com/post-cyberlabs/CVE-Advisory/blob/main/CVE-2022-46527.pdf Exploit,Third Party Advisory
https://www.elsys.se/en/ers-sound/ Product
https://github.com/post-cyberlabs/CVE-Advisory/blob/main/CVE-2022-46527.pdf Exploit,Third Party Advisory
https://www.elsys.se/en/ers-sound/ Product

📤 Share & Export

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