CVE-2020-13539 : Exploit Details and Defense Strategies
Learn about CVE-2020-13539, a critical local privilege escalation vulnerability in Win-911 Enterprise V4.20.13. Understand the impact, affected systems, exploitation mechanism, and mitigation steps.
An exploitable local privilege elevation vulnerability exists in the file system permissions of the Win-911 Enterprise V4.20.13 install directory via “WIN-911 Mobile Runtime” service. This vulnerability could allow an attacker to escalate privileges by overwriting executables.
Understanding CVE-2020-13539
This CVE involves a critical local privilege escalation vulnerability in Win-911 Enterprise V4.20.13.
What is CVE-2020-13539?
The vulnerability allows an attacker to manipulate file system permissions in the Win-911 Enterprise V4.20.13 install directory through the “WIN-911 Mobile Runtime” service, potentially leading to privilege escalation.
The Impact of CVE-2020-13539
- CVSS Base Score: 9.3 (Critical)
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: None
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
- Scope: Changed
- Vector String: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Technical Details of CVE-2020-13539
This section provides more in-depth technical information about the vulnerability.
Vulnerability Description
The vulnerability arises from incorrect file system permissions in the Win-911 Enterprise V4.20.13 install directory, specifically through the “WIN-911 Mobile Runtime” service.
Affected Systems and Versions
- Affected Product: Win-911
- Affected Version: Win-911 Enterprise V4.20.13
Exploitation Mechanism
Attackers can exploit this vulnerability by overwriting various executables in the affected directory, potentially leading to privilege escalation when these executables are executed.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.
Immediate Steps to Take
- Disable unnecessary services and restrict access to critical directories.
- Monitor file system changes and permissions regularly.
- Apply the principle of least privilege to limit access rights.
Long-Term Security Practices
- Conduct regular security audits and vulnerability assessments.
- Keep systems and software up to date with the latest patches and security updates.
Patching and Updates
- Apply patches or updates provided by the vendor to fix the vulnerability in Win-911 Enterprise V4.20.13.