CVE-2020-3535 : What You Need to Know
Learn about CVE-2020-3535, a high-severity vulnerability in Cisco Webex Teams client for Windows. Find out the impact, affected systems, and mitigation steps.
A vulnerability in the loading mechanism of specific DLLs in the Cisco Webex Teams client for Windows could allow an authenticated, local attacker to load a malicious library. The attacker needs valid credentials on the Windows system to exploit this vulnerability.
Understanding CVE-2020-3535
This CVE involves a DLL hijacking vulnerability in Cisco Webex Teams for Windows.
What is CVE-2020-3535?
The vulnerability allows an attacker to load a malicious library by placing a DLL file in a specific location on the targeted system.
The Impact of CVE-2020-3535
- CVSS Base Score: 7.8 (High Severity)
- Attack Vector: Local
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
Technical Details of CVE-2020-3535
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability is a result of incorrect handling of directory paths at runtime, allowing an attacker to execute arbitrary code on the system.
Affected Systems and Versions
- Affected Product: Cisco Webex Teams
- Vendor: Cisco
- Affected Version: n/a
Exploitation Mechanism
The attacker needs valid credentials on the Windows system to place a malicious DLL file in a specific location, which will execute when the vulnerable application launches.
Mitigation and Prevention
Protecting systems from this vulnerability is crucial.
Immediate Steps to Take
- Apply security patches provided by Cisco promptly.
- Monitor for any unusual DLL loading activities.
Long-Term Security Practices
- Implement the principle of least privilege to restrict user access.
- Regularly update and patch software to prevent vulnerabilities.
Patching and Updates
- Regularly check for security updates from Cisco and apply them as soon as they are available.