CVE-2020-3435 : What You Need to Know

A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to overwrite VPN profiles on an affected device.

Understanding CVE-2020-3435

This CVE involves a security flaw in Cisco AnyConnect Secure Mobility Client for Windows that could be exploited by a local attacker to modify VPN profiles.

What is CVE-2020-3435?

The vulnerability in Cisco AnyConnect Secure Mobility Client for Windows allows an authenticated attacker to overwrite VPN profiles on the device by sending a crafted IPC message.

The Impact of CVE-2020-3435

CVSS Base Score: 5.5 (Medium Severity)
Attack Vector: Local
Integrity Impact: High
Privileges Required: Low
Scope: Unchanged

Technical Details of CVE-2020-3435

This section provides more technical insights into the vulnerability.

Vulnerability Description

The flaw arises from insufficient validation of user-supplied input in the IPC channel of Cisco AnyConnect Secure Mobility Client for Windows.

Affected Systems and Versions

Affected Product: Cisco AnyConnect Secure Mobility Client
Vendor: Cisco
Affected Version: Not applicable

Exploitation Mechanism

The attacker needs valid credentials on the Windows system to send a crafted IPC message to the AnyConnect process and modify VPN profile files.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Ensure all users have strong, unique credentials
Monitor and restrict IPC communications
Implement the principle of least privilege

Long-Term Security Practices

Regularly update and patch the AnyConnect Secure Mobility Client
Conduct security training for users on safe practices

Patching and Updates

Stay informed about security advisories from Cisco and apply patches promptly to mitigate the risk of exploitation.