CVE-2022-20805 : What You Need to Know
Learn about CVE-2022-20805, a vulnerability in Cisco Umbrella Secure Web Gateway that allows attackers to bypass SSL decryption, potentially leading to the download of malicious content. Discover impact, technical details, and mitigation strategies.
A vulnerability in the automatic decryption process in Cisco Umbrella Secure Web Gateway (SWG) could allow an authenticated, adjacent attacker to bypass SSL decryption and content filtering policies, potentially leading to the download of malicious content on a protected network. This article dives into the specifics of CVE-2022-20805.
Understanding CVE-2022-20805
This section provides insights into the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2022-20805?
The vulnerability in the automatic decryption process in Cisco Umbrella SWG allows an adjacent attacker to bypass SSL decryption and content filtering policies on affected systems.
The Impact of CVE-2022-20805
Successful exploitation of this vulnerability could enable malicious content to be downloaded to a host on a protected network, potentially compromising system security.
Technical Details of CVE-2022-20805
Let's explore the technical aspects of this vulnerability further.
Vulnerability Description
The vulnerability is a result of how the decryption function in Cisco Umbrella SWG uses the TLS Server Name Indication (SNI) extension in an HTTP request to discover the destination domain, potentially leading to decryption bypass.
Affected Systems and Versions
The affected product is 'Cisco Umbrella Insights Virtual Appliance' by Cisco, with the specific affected version being 'n/a'.
Exploitation Mechanism
An authenticated adjacent attacker can exploit this vulnerability by sending a crafted request over TLS from a client to an unknown or controlled URL.
Mitigation and Prevention
Discover the steps to mitigate and prevent exploitation of CVE-2022-20805.
Immediate Steps to Take
Implement workarounds to address the vulnerability and enhance system security.
Long-Term Security Practices
Adopt long-term security practices to fortify the network against potential threats.
Patching and Updates
Ensure timely installation of patches and updates to protect systems from known vulnerabilities.