CVE-2023-34100 : What You Need to Know
Discover the high severity CVE-2023-34100 affecting Contiki-NG IoT devices. Learn about the out-of-bounds read vulnerability, its impacts, affected systems, and mitigation steps.
An out-of-bounds read vulnerability has been identified in the Contiki-NG operating system for IoT devices. This CVE, assigned a CVSS base score of 7.3, poses a high severity risk due to a lack of bounds verification in the handling of TCP MSS option values.
Understanding CVE-2023-34100
This section delves into the details of the CVE-2023-34100 vulnerability in Contiki-NG.
What is CVE-2023-34100?
Contiki-NG, an open-source IoT operating system, is affected by an out-of-bounds read vulnerability. When processing TCP MSS option values, the OS fails to validate buffer indices properly, leading to a read out of the bounds of the IPv6 packet buffer.
The Impact of CVE-2023-34100
The vulnerability allows an attacker to read 2 bytes out of bounds, potentially leading to sensitive data exposure or a system crash. It poses a significant risk to the integrity and availability of IoT devices running on the affected Contiki-NG versions.
Technical Details of CVE-2023-34100
Let's explore the technical aspects associated with CVE-2023-34100.
Vulnerability Description
In Contiki-NG's os/net/ipv6/uip6.c module, a 2-byte buffer read occurs out of the IPV6 packet buffer's bounds. This can result in a security breach or data corruption if exploited by a malicious actor.
Affected Systems and Versions
The vulnerability affects Contiki-NG versions up to and including 4.8. Users of these versions are advised to upgrade to version 4.9 when released to mitigate the risk.
Exploitation Mechanism
By manipulating TCP MSS option values, an attacker can trigger the out-of-bounds read, potentially leading to unauthorized access or system compromise.
Mitigation and Prevention
Protecting systems from CVE-2023-34100 requires immediate action and long-term security practices.
Immediate Steps to Take
Stay vigilant for the release of Contiki-NG version 4.9 and promptly apply the latest updates to safeguard your IoT devices against this vulnerability.
Long-Term Security Practices
Ensure regular patching of software and firmware to address known vulnerabilities and enhance the security posture of your IoT infrastructure.
Patching and Updates
Monitor the 'develop' branch of Contiki-NG for the fix and apply the necessary updates to eliminate the risk posed by CVE-2023-34100.