CVE-2022-46393 : Security Advisory and Response
CVE-2022-46393 highlights a heap-based buffer overflow and over-read vulnerability in Mbed TLS versions before 2.28.2 and 3.x before 3.3.0. Learn about its impact, affected systems, and mitigation steps.
An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. This CVE describes a potential heap-based buffer overflow and heap-based buffer over-read in DTLS when MBEDTLS_SSL_DTLS_CONNECTION_ID is enabled and MBEDTLS_SSL_CID_IN_LEN_MAX is greater than 2 times MBEDTLS_SSL_CID_OUT_LEN_MAX.
Understanding CVE-2022-46393
This section will provide an overview of the CVE-2022-46393 vulnerability and its impact.
What is CVE-2022-46393?
CVE-2022-46393 highlights a critical issue in Mbed TLS versions prior to 2.28.2 and 3.x before 3.3.0. It specifically involves a potential heap-based buffer overflow and heap-based buffer over-read in DTLS configurations.
The Impact of CVE-2022-46393
The vulnerability in CVE-2022-46393 can lead to security breaches, unauthorized access, and potential crashes due to the buffer overflow and over-read within DTLS setups.
Technical Details of CVE-2022-46393
In this section, we will delve into the technical aspects of CVE-2022-46393.
Vulnerability Description
The vulnerability arises in Mbed TLS due to improper handling of memory buffers in specific DTLS circumstances, potentially allowing malicious actors to exploit the system.
Affected Systems and Versions
All versions of Mbed TLS before 2.28.2 and 3.x prior to 3.3.0 are impacted by CVE-2022-46393, emphasizing the importance of immediate action for users of these versions.
Exploitation Mechanism
By enabling MBEDTLS_SSL_DTLS_CONNECTION_ID with MBEDTLS_SSL_CID_IN_LEN_MAX exceeding twice the value of MBEDTLS_SSL_CID_OUT_LEN_MAX, attackers could trigger the vulnerability through crafted inputs.
Mitigation and Prevention
This section will outline the necessary steps to mitigate and prevent the risks associated with CVE-2022-46393.
Immediate Steps to Take
Users are urged to update their Mbed TLS installations to version 2.28.2 or 3.3.0 to address the heap-based buffer overflow and over-read vulnerabilities described in this CVE.
Long-Term Security Practices
Implementing secure coding practices and regular security audits can fortify systems against similar vulnerabilities in the future.
Patching and Updates
Regularly monitoring and applying security patches released by Mbed TLS can help in safeguarding systems against known threats.