CVE-2020-27153 : Security Advisory and Response
CVE-2020-27153 is a vulnerability in BlueZ before 5.55 that could allow a remote attacker to trigger a denial of service or execute code. Learn about the impact, technical details, and mitigation steps.
In BlueZ before 5.55, a double free vulnerability in the gatttool disconnect_cb() routine could allow a remote attacker to trigger a denial of service or execute arbitrary code.
Understanding CVE-2020-27153
What is CVE-2020-27153?
CVE-2020-27153 is a vulnerability in BlueZ that could be exploited by a remote attacker to cause a denial of service or potentially execute malicious code.
The Impact of CVE-2020-27153
The vulnerability could lead to a denial of service or code execution during service discovery due to a redundant disconnect MGMT event.
Technical Details of CVE-2020-27153
Vulnerability Description
A double free vulnerability was discovered in the gatttool disconnect_cb() routine from shared/att.c in BlueZ before version 5.55.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The vulnerability could be exploited by a remote attacker during service discovery, leading to a denial of service or potential code execution.
Mitigation and Prevention
Immediate Steps to Take
- Update BlueZ to version 5.55 or later to mitigate the vulnerability.
- Monitor vendor security advisories for patches and updates.
Long-Term Security Practices
- Regularly update software and firmware to the latest versions.
- Implement network segmentation and access controls to limit exposure to potential attacks.
- Conduct regular security assessments and penetration testing.
Patching and Updates
- Apply patches provided by BlueZ promptly to address the vulnerability and enhance system security.