Heap-buffer-overflow in epassNUMBER_pkcs15_generate_key in opensc
Summary
OSV-2023-1169: Heap-buffer-overflow in epassNUMBER_pkcs15_generate_key. Affects opensc versions >= 22f73781706a293d10ebe982ece863a73fd62bf3, < 609164045facaeae193feb48d9c2fc5cc4321e8a. Fixed in 609164045facaeae193feb48d9c2fc5cc4321e8a. How to fix ↓
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Background
OpenSC is an open-source smart card library that provides a set of cryptographic functions for interacting with smart cards. It is commonly used in applications that require secure authentication and data encryption. The vulnerability in question affects the epassNUMBER_pkcs15_generate_key function within OpenSC, leading to a heap-buffer-overflow read. This vulnerability can potentially be exploited by an attacker to execute arbitrary code or cause a denial-of-service condition.
Vulnerability Detail
The heap-buffer-overflow vulnerability in epassNUMBER_pkcs15_generate_key arises due to a flaw in the implementation of the function. When certain input data is processed, it can lead to a read beyond the bounds of a heap buffer, resulting in a crash or potential code execution. The vulnerability was discovered through OSS-Fuzz, and more details can be found in the provided report. The severity of this vulnerability is classified as MEDIUM.
How To Fix
Minimum fixed version
609164045facaeae193feb48d9c2fc5cc4321e8a
This is the first release that contains the fix.
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Workaround
As a workaround, if updating the OpenSC package is not immediately feasible, it is recommended to disable or restrict access to the affected functionality. This can help mitigate the risk of exploitation until a proper fix can be applied.
Conclusion
In conclusion, the heap-buffer-overflow vulnerability in epassNUMBER_pkcs15_generate_key in the OpenSC package can be mitigated by updating to a fixed version or applying the provided workaround. It is crucial to address this vulnerability promptly to prevent potential exploitation. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
OpenSC is an open-source smart card library used for secure authentication and data encryption.
A heap-buffer-overflow vulnerability occurs when a program tries to read or write data beyond the bounds of a heap-allocated buffer, potentially leading to crashes or code execution.
This vulnerability was discovered through OSS-Fuzz, a continuous fuzzing service for open-source software.
The severity of this vulnerability is classified as MEDIUM.
To fix this vulnerability, update the OpenSC package to a version that includes the fix.
References
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