CVE-2021-3655 : What You Need to Know

A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on inbound SCTP packets may allow the kernel to read uninitialized memory.

Understanding CVE-2021-3655

This CVE, identified as CVE-2021-3655, pertains to a vulnerability discovered in the Linux kernel.

What is CVE-2021-3655?

The CVE-2021-3655 vulnerability exists in versions earlier than v5.14-rc1 of the Linux kernel. It involves a lack of size validations on incoming SCTP packets, potentially leading to unauthorized memory access by the kernel.

The Impact of CVE-2021-3655

This vulnerability could be exploited by malicious actors to read uninitialized memory on affected systems, potentially resulting in a breach of sensitive information or unauthorized system access.

Technical Details of CVE-2021-3655

In-depth technical information about the CVE-2021-3655 vulnerability is crucial for understanding its implications and implementing appropriate security measures.

Vulnerability Description

The vulnerability in the Linux kernel prior to v5.14-rc1 arises from a failure to perform adequate size checks on inbound SCTP packets, opening the door for unauthorized memory reading.

Affected Systems and Versions

Systems running Linux kernel versions older than v5.14-rc1 are vulnerable to CVE-2021-3655. It is essential to identify affected systems for timely mitigation measures.

Exploitation Mechanism

Exploiting CVE-2021-3655 involves sending crafted SCTP packets to targeted systems lacking proper size validations, enabling attackers to access uninitialized memory.

Mitigation and Prevention

Addressing CVE-2021-3655 requires immediate action and long-term security strategies to safeguard systems from potential exploits.

Immediate Steps to Take

System administrators should apply relevant security updates and patches provided by the Linux kernel maintainers to mitigate the CVE-2021-3655 vulnerability effectively.

Long-Term Security Practices

Implementing strong access controls, network segmentation, and regular security assessments can enhance overall system resilience against memory-related vulnerabilities like CVE-2021-3655.

Patching and Updates

Regularly monitor official sources for patches and updates addressing CVE-2021-3655. Timely patching is essential to eliminate known vulnerabilities and enhance system security.