CVE-2022-20968 : Security Advisory and Response
Learn about CVE-2022-20968, a vulnerability in Cisco IP Phone 7800 and 8800 Series firmware that could allow an attacker to trigger a stack overflow, leading to remote code execution or denial of service.
A vulnerability in the Cisco Discovery Protocol processing feature of Cisco IP Phone 7800 and 8800 Series firmware could allow an unauthenticated, adjacent attacker to cause a stack overflow on an affected device.
Understanding CVE-2022-20968
This CVE identifies a vulnerability in Cisco IP Phone 7800 and 8800 Series firmware that could be exploited by an adjacent attacker to trigger a stack overflow, potentially leading to remote code execution or a denial of service.
What is CVE-2022-20968?
CVE-2022-20968 pertains to insufficient input validation of received Cisco Discovery Protocol packets, which could be exploited by sending crafted packets to an affected device.
The Impact of CVE-2022-20968
An attacker exploiting this vulnerability could cause a stack overflow, resulting in potential remote code execution or a denial of service condition on the affected device.
Technical Details of CVE-2022-20968
Vulnerability Description
The vulnerability is due to insufficient input validation of received Cisco Discovery Protocol packets, making it exploitable by sending crafted packets to the device.
Affected Systems and Versions
Various versions of Cisco Session Initiation Protocol (SIP) Software are affected, ranging from 9.3(3) to 14.1(1). A comprehensive list of affected versions is available.
Exploitation Mechanism
The vulnerability can be exploited by an unauthenticated, adjacent attacker sending crafted Cisco Discovery Protocol traffic to the affected device, causing a stack overflow.
Mitigation and Prevention
Immediate Steps to Take
Users are advised to apply the necessary security updates provided by Cisco to address the vulnerability. It is recommended to monitor Cisco's security advisories for the latest patches.
Long-Term Security Practices
Apart from applying patches, organizations should implement security best practices like network segmentation, access control, and regular security assessments to enhance overall system security.
Patching and Updates
Cisco has released patches to mitigate the vulnerability in the affected software versions. Users are urged to update their systems promptly to prevent potential exploitation.