CVE-2022-0823 : Security Advisory and Response
Learn about CVE-2022-0823, a medium-severity vulnerability in Zyxel GS1200 switches allowing local attackers to guess passwords through a timing side-channel attack. Stay secure with mitigation strategies.
This article provides an overview of CVE-2022-0823, a vulnerability in Zyxel GS1200 series switches that could allow a local attacker to guess passwords through a timing side-channel attack.
Understanding CVE-2022-0823
This section delves into the details of the vulnerability, its impact, technical aspects, and mitigation strategies.
What is CVE-2022-0823?
The CVE-2022-0823 vulnerability pertains to an improper control of interaction frequency in Zyxel GS1200 series switches. It enables a local attacker to guess passwords using a timing side-channel attack.
The Impact of CVE-2022-0823
The impact of CVE-2022-0823 is considered medium with a base score of 6.2 according to the CVSSv3.1 metrics. The confidentiality impact is high while availability impact is none.
Technical Details of CVE-2022-0823
This section provides a deeper dive into the vulnerability, including its description, affected systems, versions, and exploitation mechanism.
Vulnerability Description
The vulnerability allows local attackers to exploit an interaction frequency flaw in Zyxel GS1200 series firmware version 2.00 Patch 1 to guess passwords through a side-channel timing attack.
Affected Systems and Versions
Zyxel GS1200 series switches running firmware version 2.00 Patch 1 are affected by CVE-2022-0823.
Exploitation Mechanism
Attackers can exploit this vulnerability locally to guess passwords by leveraging the timing side-channel attack technique.
Mitigation and Prevention
This section outlines steps to mitigate the CVE-2022-0823 vulnerability and prevent potential exploitation.
Immediate Steps to Take
Users are advised to update their Zyxel GS1200 series switches to a secure firmware version that patches the interaction frequency issue.
Long-Term Security Practices
Implement strong password policies, restrict physical access to devices, and regularly monitor for any suspicious activities on the network.
Patching and Updates
Zyxel has released a patch to address the vulnerability. Ensure all affected devices are promptly updated with the latest firmware to mitigate the risk of password guessing attacks.