CVE-2021-46854 : Exploit Details and Defense Strategies
Learn about CVE-2021-46854, a vulnerability in ProFTPD allowing memory disclosure to RADIUS servers. Find mitigation steps and update recommendations here.
CVE-2021-46854, also known as mod_radius vulnerability in ProFTPD, has the potential to disclose memory to RADIUS servers due to how it handles certain data blocks.
Understanding CVE-2021-46854
What is CVE-2021-46854?
Mod_radius in ProFTPD before version 1.3.7c has a vulnerability that can lead to memory disclosure to RADIUS servers. This occurs because it replicates blocks of 16 characters.
The Impact of CVE-2021-46854
This vulnerability could allow unauthorized disclosure of sensitive data to RADIUS servers, potentially leading to information exposure and exploitation.
Technical Details of CVE-2021-46854
Vulnerability Description
- Vulnerability in mod_radius in ProFTPD before 1.3.7c
- Allows memory disclosure to RADIUS servers
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Affected version: n/a
Exploitation Mechanism
The vulnerability stems from how ProFTPD handles certain data blocks, allowing attackers to access memory content that should be restricted.
Mitigation and Prevention
Immediate Steps to Take
- Update ProFTPD to version 1.3.7c or later
- Implement network segmentation to limit access to vulnerable services
Long-Term Security Practices
- Regularly monitor and audit network traffic
- Train personnel on identifying and reporting suspicious activities
Patching and Updates
- Apply patches and updates provided by ProFTPD promptly