CVE-2021-3520 : What You Need to Know
Explore the impact, technical details, and mitigation strategies for CVE-2021-3520, a flaw in lz4 allowing out-of-bounds writes. Learn how to secure your systems.
A detailed overview of CVE-2021-3520 focusing on the vulnerability in lz4, its impact, technical details, and mitigation strategies.
Understanding CVE-2021-3520
This section delves into the critical aspects of CVE-2021-3520.
What is CVE-2021-3520?
The vulnerability in lz4 could allow an attacker to trigger an integer overflow by submitting a crafted file, leading to an out-of-bounds write and potential crashes.
The Impact of CVE-2021-3520
The main impact of this vulnerability is on availability, with some possible implications for confidentiality and integrity.
Technical Details of CVE-2021-3520
Explore the technical specifics of CVE-2021-3520 below.
Vulnerability Description
An attacker can exploit the flaw in lz4 to call memmove() with a negative size argument, resulting in out-of-bounds writes.
Affected Systems and Versions
The vulnerability affects the 'lz4-1.8.3' version.
Exploitation Mechanism
By submitting a specially crafted file to an application linked with lz4, an attacker can trigger the integer overflow.
Mitigation and Prevention
Discover the necessary steps to prevent and mitigate the risks associated with CVE-2021-3520.
Immediate Steps to Take
Patch the affected system and monitor for any unusual activities.
Long-Term Security Practices
Enhance system security by regularly updating software and implementing access controls.
Patching and Updates
Ensure you apply the latest patches provided by the vendor to address the vulnerability.