CVE-2021-3571 Explained : Impact and Mitigation
CVE-2021-3571 poses a threat to data confidentiality and system availability in linuxptp versions before 3.1.1 and 2.0.1. Learn about the impact, technical details, and mitigation steps.
A flaw was discovered in the ptp4l program of the linuxptp package, potentially allowing a remote attacker to exploit the system. This vulnerability affects linuxptp versions prior to 3.1.1 and 2.0.1.
Understanding CVE-2021-3571
This CVE refers to a security issue found in the ptp4l program of the linuxptp package, posing a risk to data confidentiality and system availability.
What is CVE-2021-3571?
The flaw in the ptp4l program of the linuxptp package could be abused by a remote attacker operating on a little-endian architecture as a PTP transparent clock. By sending a crafted one-step sync message, the attacker could trigger an information leak or system crash.
The Impact of CVE-2021-3571
The primary risk associated with this vulnerability is the potential compromise of data confidentiality and system availability.
Technical Details of CVE-2021-3571
This section delves into the specifics of the vulnerability, detailing affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability in the ptp4l program on little-endian architectures allows attackers to send malicious sync messages, leading to information leaks or system crashes.
Affected Systems and Versions
CVE-2021-3571 impacts linuxptp versions earlier than 3.1.1 and 2.0.1.
Exploitation Mechanism
Remote attackers can exploit this vulnerability by sending carefully crafted sync messages to the ptp4l program, causing potential data leaks or system crashes.
Mitigation and Prevention
To address CVE-2021-3571, immediate action must be taken to safeguard systems and prevent exploitation.
Immediate Steps to Take
Update linuxptp to version 3.1.1 or 2.0.1 to mitigate the risk of exploitation and protect system integrity.
Long-Term Security Practices
Regularly monitor for security updates and patches for the linuxptp package to prevent potential vulnerabilities.
Patching and Updates
Stay informed about security advisories and promptly apply patches released by the vendor to maintain system security.