CVE-2022-20686 Explained : Impact and Mitigation
Discover multiple vulnerabilities in Cisco ATA 190 Series Analog Telephone Adapter firmware allowing remote attackers to execute arbitrary code and trigger denial of service.
This article provides detailed information about multiple vulnerabilities in Cisco ATA 190 Series Analog Telephone Adapter firmware and their impact, technical details, and mitigation strategies.
Understanding CVE-2022-20686
Multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) functionality of Cisco ATA 190 Series Analog Telephone Adapter firmware could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device and cause the LLDP service to restart.
What is CVE-2022-20686?
These vulnerabilities are due to missing length validation of certain LLDP packet header fields. An attacker could exploit these vulnerabilities by sending a malicious LLDP packet to an affected device. A successful exploit could allow the attacker to execute code on the affected device and cause LLDP to restart unexpectedly, resulting in a denial of service (DoS) condition.
The Impact of CVE-2022-20686
The impact of CVE-2022-20686 includes the ability for an attacker to execute arbitrary code on the affected device and disrupt the LLDP service, leading to denial of service.
Technical Details of CVE-2022-20686
Vulnerability Description
The vulnerabilities are a result of missing length validation of specific LLDP packet header fields, enabling remote attackers to execute arbitrary code.
Affected Systems and Versions
- Vendor: Cisco
- Product: Cisco Analog Telephone Adaptor (ATA) Software
- Affected Versions: 1.2.1, 1.2.2 SR1, 1.2.2, 1.2.2 SR2, 11.1.0 MSR4, 11.1.0, 11.1.0 MSR1, 11.1.0 MSR2, 11.1.0 MSR3, 1.1.0, 1.1.1, 1.1.2, 12.0.1 SR2, 12.0.1, 12.0.1 SR1, 12.0.1 SR3, 12.0.1 SR4, 11.2.1
Exploitation Mechanism
Attackers can exploit these vulnerabilities by sending a malicious LLDP packet to an affected device, allowing them to execute arbitrary code and disrupt the LLDP service.
Mitigation and Prevention
Immediate Steps to Take
To mitigate the risks associated with CVE-2022-20686, users are advised to apply security updates provided by Cisco promptly.
Long-Term Security Practices
Implementing network segmentation, restricting network access, and monitoring network traffic can enhance long-term security posture.
Patching and Updates
Regularly check for security advisories from Cisco and apply patches to address known vulnerabilities in a timely manner.