CVE-2023-20126: A Critical Cisco Vulnerability Threatening SPA112 Phone Adapters

The world of cybersecurity is continuously evolving, with companies constantly working to patch security vulnerabilities and protect their customers. However, when a high-risk vulnerability is discovered, the stakes are raised significantly. Today, we bring to light one such vulnerability, CVE-2023-20126, which has a CVSS score of 9.8, putting it in the “critical” category. This vulnerability affects Cisco SPA112 2-Port Phone Adapters and allows an attacker to execute arbitrary code on affected devices.

The Vulnerability: A Deep Dive

CVE-2023-20126 is a security vulnerability in the web-based management interface of Cisco SPA112 2-Port Phone Adapters. It is caused by a missing authentication process within the firmware upgrade function, which allows an unauthenticated, remote attacker to execute arbitrary code on the affected device.

An attacker can exploit this vulnerability by upgrading the affected device to a crafted version of the firmware. This would grant the attacker full privileges, enabling them to execute arbitrary code and potentially gain unauthorized access to sensitive data or disrupt critical systems.

Affected Products and Potential Impact

This vulnerability affects all firmware releases for Cisco SPA112 2-Port Phone Adapters. Given the severity of the issue, this has the potential to impact a large number of devices and their users. To date, the Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of this vulnerability. However, it is important to remain vigilant and take necessary precautions.

No Fix: Cisco SPA112 Devices Enter End-of-Life

Unfortunately, Cisco has not released, and will not release, firmware updates to address this vulnerability. The Cisco SPA112 2-Port Phone Adapters have entered the end-of-life process, which means that the company will no longer provide support or updates for these devices. As a result, customers are encouraged to migrate to the Cisco ATA 190 Series Analog Telephone Adapter, which is not affected by this vulnerability.

Next Steps

Cisco would like to thank CataLpa of Dbappsecurity Co., Ltd. Hatlab, for reporting this vulnerability. With the absence of a firmware update, it is crucial for users of the affected devices to promptly migrate to a more secure alternative, such as the Cisco ATA 190 Series Analog Telephone Adapter. By doing so, users can mitigate the risk of falling victim to potential cyberattacks that may exploit this vulnerability.

In conclusion, CVE-2023-20126 is a critical security vulnerability that affects Cisco SPA112 2-Port Phone Adapters. Users are urged to remain vigilant, monitor the situation, and migrate to a more secure alternative in order to protect their systems and data from potential threats.