CVE-2021-22887 : Vulnerability Insights and Analysis
Learn about CVE-2021-22887, a critical vulnerability in Pulse Secure BIOS of PSA5000 and PSA7000 models that allows unauthorized access to BIOS firmware. Find out the impact, affected systems, exploitation details, and mitigation steps.
A vulnerability in the BIOS of Pulse Secure (PSA-Series Hardware) models PSA5000 and PSA7000 could allow an attacker to compromise BIOS firmware. This vulnerability can be exploited only as part of an attack chain. Before an attacker can compromise the BIOS, they must exploit the device.
Understanding CVE-2021-22887
This CVE identifies a critical vulnerability in the BIOS of Pulse Secure devices that could be leveraged by attackers to compromise the BIOS firmware.
What is CVE-2021-22887?
The vulnerability in the BIOS of Pulse Secure PSA5000 and PSA7000 models enables attackers to compromise the BIOS firmware. It requires prior exploitation of the device to succeed.
The Impact of CVE-2021-22887
If exploited, this vulnerability could lead to unauthorized access and control over the BIOS firmware of impacted Pulse Secure devices, posing a significant security risk.
Technical Details of CVE-2021-22887
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability allows attackers to compromise the BIOS firmware of PSA5000 and PSA7000 models, necessitating an initial device exploitation.
Affected Systems and Versions
The affected systems are Pulse Secure PSA5000 and PSA7000, with the vulnerability existing up to version 3.0d.
Exploitation Mechanism
Exploiting this vulnerability requires chaining it with an initial device compromise to successfully compromise the BIOS firmware.
Mitigation and Prevention
Discover the steps to mitigate the risks associated with CVE-2021-22887.
Immediate Steps to Take
Users should implement immediate security measures to prevent unauthorized BIOS firmware access, such as network segmentation and access controls.
Long-Term Security Practices
To sustain long-term security, regular security assessments, firmware updates, and monitoring for suspicious activities are recommended.
Patching and Updates
Ensure all Pulse Secure PSA5000 and PSA7000 devices are updated to version 3.0d or above to patch the vulnerability and enhance security.