CVE-2021-45417 : Vulnerability Insights and Analysis

AIDE before 0.17.4 allows local users to obtain root privileges via crafted file metadata, leading to a heap-based buffer overflow.

Understanding CVE-2021-45417

What is CVE-2021-45417?

AIDE (Advanced Intrusion Detection Environment) before version 0.17.4 is susceptible to a heap-based buffer overflow vulnerability. This vulnerability could be exploited by local users to gain root privileges through specially crafted file metadata.

The Impact of CVE-2021-45417

The vulnerability in AIDE before 0.17.4 can result in local users being able to elevate their privileges to root on the affected system. This could lead to unauthorized access and potential malicious activities.

Technical Details of CVE-2021-45417

Vulnerability Description

The vulnerability arises due to a heap-based buffer overflow in AIDE versions prior to 0.17.4. It occurs when handling file metadata like XFS extended attributes or tmpfs ACLs.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Vulnerable Versions: AIDE versions from 0.13 to 0.17.3

Exploitation Mechanism

The vulnerability can be exploited by local users to manipulate specific file metadata, triggering the heap-based buffer overflow and potentially achieving root privileges.

Mitigation and Prevention

Immediate Steps to Take

Update AIDE to version 0.17.4 or later to mitigate the vulnerability.
Implement the principle of least privilege to restrict user permissions.

Long-Term Security Practices

Regularly monitor and audit file system changes and permissions.
Conduct security awareness training to educate users about the importance of secure file handling.

Patching and Updates

Apply security patches promptly as they become available to address known vulnerabilities in AIDE.