CVE-2021-28362 : Vulnerability Insights and Analysis
Discover the impact and mitigation strategies for CVE-2021-28362, a vulnerability in Contiki versions up to 3.0. Learn about the risk of memory corruption and Denial-of-Service (DoS) conditions.
An issue was discovered in Contiki through version 3.0. A vulnerability exists when sending an ICMPv6 error message due to invalid extension header options in an incoming IPv6 packet. This can result in memory corruption leading to a Denial-of-Service (DoS) condition.
Understanding CVE-2021-28362
This section provides insights into the impact and technical details of CVE-2021-28362.
What is CVE-2021-28362?
The vulnerability in Contiki through version 3.0 allows for the construction of an invalid extension header that can cause memory corruption problems, potentially resulting in a DoS condition. The issue is specifically related to 'rpl-ext-header.c'.
The Impact of CVE-2021-28362
Exploiting this vulnerability can lead to memory corruption issues and a DoS condition, affecting the availability of the system and disrupting normal operations.
Technical Details of CVE-2021-28362
This section provides a deeper look into the technical aspects of the vulnerability.
Vulnerability Description
When handling ICMPv6 error messages, an unchecked packet length and extension header length can result in integer underflow, enabling the construction of malicious extension headers leading to memory corruption.
Affected Systems and Versions
Contiki versions up to 3.0 are affected by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting a malicious extension header with specific characteristics to trigger memory corruption and induce a DoS condition.
Mitigation and Prevention
This section highlights the steps to mitigate and prevent exploitation of CVE-2021-28362.
Immediate Steps to Take
Immediate action should include applying patches or updates released by Contiki to address the vulnerability. Network monitoring for anomalous traffic patterns can also aid in detecting exploitation attempts.
Long-Term Security Practices
Implementing secure coding practices, regular security audits, and keeping systems up-to-date with the latest patches can help prevent such vulnerabilities in the long term.
Patching and Updates
Users are advised to update Contiki to versions that include fixes for CVE-2021-28362 to mitigate the risk of exploitation and enhance system security.