CVE-2015-2098 – CVE-2015-2098 is a critical stack-based buffer ... (How to Fix)

Q: What is the severity of CVE-2015-2098?

CVE-2015-2098 has a CVSS score of 8.8 (HIGH). CVE-2015-2098 is a critical stack-based buffer overflow vulnerability in WebGate eDVR Manager that allows remote attackers to execute arbitrary code on affected systems. Attackers can exploit this via multiple functions in the WESPEvent, WESPPlayback, and WESPPTZ ActiveX controls. Organizations using WebGate eDVR Manager for video surveillance systems are affected.

📋 TL;DR

CVE-2015-2098 is a critical stack-based buffer overflow vulnerability in WebGate eDVR Manager that allows remote attackers to execute arbitrary code on affected systems. Attackers can exploit this via multiple functions in the WESPEvent, WESPPlayback, and WESPPTZ ActiveX controls. Organizations using WebGate eDVR Manager for video surveillance systems are affected.

💻 Affected Systems

Products:

WebGate eDVR Manager

Versions: All versions prior to patch

Operating Systems: Windows

Default Config Vulnerable: ⚠️ Yes

Notes: Affects systems using the vulnerable ActiveX controls for video surveillance management. The vulnerability is in the ActiveX components used by the eDVR Manager software.

📦 What is this software?

Edvr Manager by Webgateinc

View all CVEs affecting Edvr Manager →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise with remote code execution leading to full control of the affected system, potential lateral movement within networks, and installation of persistent malware.

🟠

Likely Case

Remote code execution leading to system compromise, data theft, surveillance system manipulation, and potential ransomware deployment.

🟢

If Mitigated

Limited impact with proper network segmentation and security controls, potentially only affecting the isolated surveillance system.

🌐 Internet-Facing: HIGH - The vulnerability can be exploited remotely without authentication, making internet-facing systems extremely vulnerable to attack.

🏢 Internal Only: HIGH - Even internally, the vulnerability allows unauthenticated remote code execution, posing significant risk to network security.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Multiple exploitation vectors exist across different functions. The vulnerability requires the ActiveX controls to be loaded in a web browser or application context.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Unknown specific version - check with WebGate vendor

Vendor Advisory: Not publicly available - contact WebGate directly

Restart Required: Yes

Instructions:

1. Contact WebGate for the latest patched version. 2. Backup current configuration. 3. Install the updated version. 4. Restart the system. 5. Verify the patch is applied.

🔧 Temporary Workarounds

Disable vulnerable ActiveX controls

windows

Set kill bits for the vulnerable ActiveX controls to prevent them from loading in Internet Explorer

reg add "HKLM\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{CLSID}" /v "Compatibility Flags" /t REG_DWORD /d 0x00000400 /f

Network segmentation

all

Isolate surveillance systems from other network segments

🧯 If You Can't Patch

Implement strict network segmentation to isolate surveillance systems from critical infrastructure
Deploy application whitelisting to prevent execution of unauthorized code

🔍 How to Verify

Check if Vulnerable:

Check if WebGate eDVR Manager is installed and if vulnerable ActiveX controls are registered (CLSIDs: check ZDI advisories for specific identifiers)

Check Version:

Check WebGate eDVR Manager version in Control Panel > Programs and Features or via vendor-specific version check

Verify Fix Applied:

Verify with vendor that patched version is installed and test that vulnerable functions no longer cause buffer overflows

📡 Detection & Monitoring

Log Indicators:

Unusual process creation from eDVR Manager components
Access to vulnerable ActiveX control functions
Crash logs from WESPEvent, WESPPlayback, or WESPPTZ components

Network Indicators:

Unusual network traffic to/from surveillance system ports
Exploit patterns targeting ActiveX controls

SIEM Query:

Process Creation where Image contains "eDVR" OR CommandLine contains "WESPEvent" OR "WESPPlayback" OR "WESPPTZ"

📊 Metadata

CVE ID: CVE-2015-2098

CVSS v3 Score: 8.8 (HIGH)

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

CWE: CWE-120

Published: July 22, 2021

Last Updated: November 21, 2024

🔗 References

http://www.zerodayinitiative.com/advisories/ZDI-15-058/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-060/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-061/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-064/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-065/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-066/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-058/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-060/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-061/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-064/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-065/ Third Party Advisory,VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-066/ Third Party Advisory,VDB Entry

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🔗 Related Vulnerabilities

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