CVE-2019-15258 : Security Advisory and Response

A vulnerability in the web-based management interface of Cisco SPA100 Series Analog Telephone Adapters (ATAs) could allow an authenticated, remote attacker to cause a denial of service condition on an affected device.

Understanding CVE-2019-15258

This CVE refers to a denial of service vulnerability in Cisco SPA100 Series Analog Telephone Adapters due to improper validation of user-supplied requests.

What is CVE-2019-15258?

The vulnerability allows an authenticated remote attacker to disrupt the device's functionality by sending a specially crafted request to the web-based management interface.

The Impact of CVE-2019-15258

Attack Complexity: Low
Attack Vector: Network
Availability Impact: High
Base Score: 6.5 (Medium Severity)
Privileges Required: Low
Scope: Unchanged
User Interaction: None
Vector String: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Technical Details of CVE-2019-15258

Vulnerability Description

The vulnerability arises from insufficient validation of user-supplied requests within the web-based management interface of Cisco SPA100 Series Analog Telephone Adapters.

Affected Systems and Versions

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

Exploitation Mechanism

To exploit this flaw, the attacker needs to send a specially crafted request to the web-based management interface of the targeted device.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches promptly.
Restrict network access to the management interface.
Monitor network traffic for signs of exploitation.

Long-Term Security Practices

Regularly update and patch all devices and software.
Implement network segmentation to limit the impact of potential attacks.
Conduct regular security assessments and audits.

Patching and Updates

Ensure that all affected devices are updated with the latest patches and firmware releases.