Buffer Underrun Vulnerability in Mbed TLS Package: CVE-2024-49195
Summary
DEBIAN-CVE-2024-49195: Mbed TLS 3.5.x through 3.6.x before 3.6.2 has a buffer underrun in pkwrite when writing an opaque key pair. Affects mbedtls versions < 3.6.2-1. Fixed in 3.6.2-1. How to fix ↓
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Background
Mbed TLS is a widely used cryptographic library designed to facilitate secure communication in embedded systems and IoT devices. It provides essential cryptographic functions such as encryption, decryption, and secure key management. The library is known for its lightweight design, making it suitable for resource-constrained environments. However, certain versions of Mbed TLS are vulnerable to a buffer underrun issue, which can compromise the integrity of cryptographic operations.
Vulnerability Detail
The vulnerability identified as CVE-2024-49195 affects Mbed TLS versions 3.5.x through 3.6.x prior to 3.6.2. It involves a buffer underrun in the pkwrite function when writing an opaque key pair. This flaw can lead to unintended behavior, potentially allowing an attacker to exploit the vulnerability to manipulate cryptographic operations. The technical implications include the risk of data leakage or corruption, which can severely impact the security of applications relying on Mbed TLS for cryptographic functions.
How To Fix
Minimum fixed version
3.6.2-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade mbedtlsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can avoid using the affected versions of Mbed TLS until they can apply the update. It is advisable to review the application code to ensure that it does not rely on the vulnerable functionality.
Conclusion
In summary, CVE-2024-49195 is a critical vulnerability in Mbed TLS that can lead to severe security implications if not addressed. Users are strongly encouraged to update to the latest version to ensure the integrity of their cryptographic operations and overall application security.
See every vulnerability recorded for mbedtls →
FAQ
CVE-2024-49195 is a vulnerability in Mbed TLS that involves a buffer underrun in the pkwrite function, affecting versions 3.5.x through 3.6.x before 3.6.2.
You can check if your application is affected by using Vulert, which monitors open-source vulnerabilities in your software. Visit Vulert Scanner to analyze your manifest file.
The risks include potential data leakage or corruption, which can compromise the security of applications that rely on Mbed TLS for cryptographic operations.
Yes, a patch is available in version 3.6.2-1 of Mbed TLS. Users should update to this version or later to mitigate the vulnerability.
If immediate updating is not possible, review your application code to ensure it does not use the vulnerable functionality and consider implementing additional security measures.
References
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