Heap-buffer-overflow in myeid_create_key in opensc

opensc Updated 02 Oct 2025

Summary

02/06/2022

Disclosed on

HIGH

Severity

Yes i

Fix available

High

Severity

Not published

CVSS Score

OSV-2022-451: Heap-buffer-overflow in myeid_create_key. Affects opensc versions >= bec4f63c5b8308d7fdca842c5c0b62c3491d106a, < 367c3ad2ef2c10cb29602f72163e7fb23c3f5827. Fixed in 367c3ad2ef2c10cb29602f72163e7fb23c3f5827. How to fix ↓

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Background

OpenSC is an open-source smart card library that provides a set of cryptographic functions and protocols for interacting with smart cards. It is commonly used in applications that require secure authentication and data encryption. The myeid_create_key function in OpenSC is responsible for creating a new key on a smart card. However, a vulnerability has been discovered in this function that can lead to a heap-buffer-overflow write error.

Vulnerability Detail

The vulnerability in myeid_create_key can be triggered when a malicious attacker provides specially crafted input to the function. This can result in a heap-buffer-overflow write error, potentially leading to arbitrary code execution or a denial of service. The vulnerability was reported through the OSS-Fuzz project and has been assigned a high severity rating. The affected version of OpenSC is bec4f63c5b8308d7fdca842c5c0b62c3491d106a, and it has been fixed in version 367c3ad2ef2c10cb29602f72163e7fb23c3f5827.

How To Fix

Minimum fixed version

367c3ad2ef2c10cb29602f72163e7fb23c3f5827

This is the first release that contains the fix.

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Workaround

There is no known workaround for this vulnerability. It is strongly advised to update to the fixed version of OpenSC as soon as possible.

Conclusion

In conclusion, a heap-buffer-overflow write vulnerability has been discovered in the myeid_create_key function of OpenSC. This vulnerability can potentially lead to arbitrary code execution or a denial of service. It is crucial to update to the fixed version of OpenSC to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.

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