CVE-2023-28058 : Security Advisory and Response
Learn about CVE-2023-28058, an improper input validation flaw in Dell BIOS, allowing local malicious users to modify UEFI variables. Mitigate with Dell's security update.
This CVE record was assigned by Dell and published on June 23, 2023. It pertains to an improper input validation vulnerability found in Dell BIOS.
Understanding CVE-2023-28058
This vulnerability in Dell BIOS allows a local authenticated malicious user with administrator privileges to potentially exploit the system in order to modify a UEFI variable.
What is CVE-2023-28058?
CVE-2023-28058 is a security vulnerability in Dell BIOS that stems from improper input validation, making it possible for a local authenticated malicious user to manipulate UEFI variables.
The Impact of CVE-2023-28058
The impact of this vulnerability is rated as "MEDIUM." While it requires high privileges for exploitation, it can lead to high integrity impact, allowing unauthorized users to modify UEFI variables.
Technical Details of CVE-2023-28058
This vulnerability has a CVSS score of 5.1 and is classified as having low attack complexity and local attack vector. The confidentiality impact is rated as none, integrity impact is high, and availability impact is low.
Vulnerability Description
The vulnerability arises from improper input validation in Dell BIOS, enabling malicious users to modify UEFI variables with high integrity impact.
Affected Systems and Versions
The affected product is "CPG BIOS" by Dell, with all versions being susceptible to this vulnerability.
Exploitation Mechanism
A local authenticated user with administrator privileges can exploit this vulnerability to manipulate UEFI variables, impacting the system's integrity.
Mitigation and Prevention
To safeguard against CVE-2023-28058, immediate steps should be taken to secure systems and prevent unauthorized access.
Immediate Steps to Take
- Apply the security update provided by Dell to address the vulnerability.
- Monitor and restrict access to sensitive system areas to prevent unauthorized modifications.
Long-Term Security Practices
- Regularly update BIOS and firmware to mitigate potential vulnerabilities.
- Implement strong authentication measures to control user access and prevent unauthorized exploits.
Patching and Updates
Dell has released a security update addressing this vulnerability. It is crucial to promptly apply this patch to protect systems from exploitation.