CVE-2019-1689 : Exploit Details and Defense Strategies

A vulnerability in Cisco Webex Teams' iOS client application allows a remote attacker to upload arbitrary files, potentially leading to a denial of service situation.

Understanding CVE-2019-1689

Cisco Webex Teams for iOS Arbitrary File Upload Vulnerability

What is CVE-2019-1689?

This CVE refers to a flaw in Cisco Webex Teams' iOS client application that enables a remote attacker to upload random files within the application's range.

The Impact of CVE-2019-1689

Attack Complexity: Low
Attack Vector: Network
Base Score: 7.3 (High)
Confidentiality Impact: None
Integrity Impact: High
Availability Impact: High
User Interaction: Required
Privileges Required: Low
Scope: Unchanged

Technical Details of CVE-2019-1689

A vulnerability in the client application for iOS of Cisco Webex Teams could allow an authenticated, remote attacker to upload arbitrary files within the scope of the iOS application.

Vulnerability Description

The flaw stems from the client application's failure to properly validate inputs, allowing an attacker to upload harmful files and potentially create a denial of service situation.

Affected Systems and Versions

Product: Cisco Webex Teams
Vendor: Cisco
Versions Affected: < 3.13.26920

Exploitation Mechanism

To exploit this vulnerability, an attacker can send a harmful file to a specific user and convince them to manually open it, leading to potential system access blockage.

Mitigation and Prevention

Immediate Steps to Take

Update Cisco Webex Teams to version 3.13.26920 to mitigate the vulnerability.

Long-Term Security Practices

Educate users on safe file handling practices to prevent similar attacks.
Regularly monitor and update security protocols to address emerging threats.

Patching and Updates

Ensure timely installation of security patches and updates to protect against known vulnerabilities.