CVE-2020-27349 : Exploit Details and Defense Strategies
Aptdaemon vulnerability in versions prior to 1.1.1+bzr982-0ubuntu34.1 allows unauthorized access. Learn the impact, affected systems, and mitigation steps.
Aptdaemon performed policykit checks after interacting with potentially untrusted files with elevated privileges. This vulnerability affected versions prior to 1.1.1+bzr982-0ubuntu34.1, 1.1.1+bzr982-0ubuntu32.3, 1.1.1+bzr982-0ubuntu19.5, 1.1.1+bzr982-0ubuntu14.5.
Understanding CVE-2020-27349
This CVE involves a vulnerability in Aptdaemon that could be exploited by interacting with untrusted files.
What is CVE-2020-27349?
Aptdaemon, a package management service, incorrectly performed policykit checks after interacting with potentially untrusted files, allowing unauthorized access.
The Impact of CVE-2020-27349
This vulnerability could be exploited by an attacker to gain elevated privileges on affected systems, potentially leading to unauthorized actions or data breaches.
Technical Details of CVE-2020-27349
Aptdaemon's mishandling of policykit checks led to a critical security issue.
Vulnerability Description
The vulnerability stemmed from Aptdaemon's delayed policykit permissions checks, enabling unauthorized access to sensitive operations.
Affected Systems and Versions
- Product: aptdaemon
- Vendor: Canonical
- Affected Versions:
- 1.1.1+bzr982-0ubuntu14.5
- 1.1.1+bzr982-0ubuntu19.5
- 1.1.1+bzr982-0ubuntu32.3
- 1.1.1+bzr982-0ubuntu34.1
Exploitation Mechanism
The vulnerability could be exploited by an attacker interacting with untrusted files to gain elevated privileges and perform unauthorized actions.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.
Immediate Steps to Take
- Update aptdaemon to a secure version that addresses the vulnerability.
- Monitor system logs for any suspicious activities.
Long-Term Security Practices
- Regularly update all software and packages to patch known vulnerabilities.
- Implement least privilege access controls to limit potential damage from security breaches.
Patching and Updates
- Apply the latest security patches provided by Canonical to fix the vulnerability in aptdaemon.