CVE-2019-15243 : Security Advisory and Response

Cisco SPA100 Series Analog Telephone Adapters Remote Code Execution Vulnerabilities were published on October 16, 2019, by Cisco. The vulnerabilities could allow an attacker to execute unauthorized code with higher privileges through the web-based management interface.

Understanding CVE-2019-15243

This CVE identifies security weaknesses in the Cisco SPA100 Series Analog Telephone Adapters (ATAs) that could be exploited by authenticated attackers to execute unauthorized code with elevated privileges.

What is CVE-2019-15243?

The vulnerability arises due to improper validation of user-supplied input in the web-based management interface of the affected devices.

The Impact of CVE-2019-15243

CVSS Base Score: 8.0 (High Severity)
Attack Vector: Adjacent Network
Attack Complexity: Low
Privileges Required: Low
Confidentiality, Integrity, and Availability Impact: High
Successful exploitation could allow an attacker to execute unauthorized code with elevated privileges.

Technical Details of CVE-2019-15243

The following technical details provide insight into the vulnerability and its implications:

Vulnerability Description

The vulnerabilities allow an attacker, authenticated and in close proximity, to execute unauthorized code with higher privileges.

Affected Systems and Versions

Affected Product: Cisco SPA112 2-Port Phone Adapter
Vendor: Cisco
Affected Version: Unspecified

Exploitation Mechanism

Attackers need to authenticate on the web-based management interface and send carefully crafted requests to the affected device to exploit the vulnerabilities.

Mitigation and Prevention

To address CVE-2019-15243, consider the following mitigation strategies:

Immediate Steps to Take

Disable the web-based management interface if not required.
Implement strong authentication mechanisms.
Regularly monitor and audit network traffic for any suspicious activities.

Long-Term Security Practices

Keep systems up to date with the latest security patches.
Conduct regular security training for employees to raise awareness of potential threats.

Patching and Updates

Apply patches provided by Cisco to address the vulnerabilities.