CVE-2020-27534 : Exploit Details and Defense Strategies
Learn about CVE-2020-27534, a vulnerability in Docker Engine before 19.03.9 that could allow attackers to exploit a potentially unsafe temporary pathname. Find out how to mitigate this security risk.
A vulnerability in Docker Engine before version 19.03.9 could allow an attacker to exploit a potentially unsafe temporary pathname.
Understanding CVE-2020-27534
This CVE involves a specific issue in the Docker Engine that could lead to security risks.
What is CVE-2020-27534?
The vulnerability arises from a specific file in the Docker Engine that creates a potentially unsafe temporary pathname.
The Impact of CVE-2020-27534
The vulnerability could be exploited by an attacker to compromise the security of the system running the affected Docker Engine.
Technical Details of CVE-2020-27534
This section provides more technical insights into the vulnerability.
Vulnerability Description
The issue occurs in util/binfmt_misc/check.go in Builder in Docker Engine before version 19.03.9, where os.OpenFile is called with a potentially unsafe qemu-check temporary pathname.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions before Docker Engine 19.03.9
Exploitation Mechanism
The vulnerability is exploited by constructing a temporary pathname with an empty first argument in an ioutil.TempDir call.
Mitigation and Prevention
Protecting systems from this vulnerability requires specific actions.
Immediate Steps to Take
- Update Docker Engine to version 19.03.9 or newer.
- Monitor for any suspicious activities on the system.
Long-Term Security Practices
- Regularly update Docker Engine and other software components.
- Implement secure coding practices to prevent similar vulnerabilities.
Patching and Updates
Ensure timely patching of Docker Engine and follow best practices for secure software development.