Heap-buffer-overflow in iasecc_parse_size in opensc
Summary
OSV-2023-1068: Heap-buffer-overflow in iasecc_parse_size. Affects opensc versions >= fa709de8dc5045f390f321cb65c9c73c36d52dd0, < fbda61d0d276dc98b9d1d1e6810bbd21d19e3859. Fixed in fbda61d0d276dc98b9d1d1e6810bbd21d19e3859. How to fix ↓
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Background
OpenSC is an open-source smart card library that provides a set of cryptographic functions and smart card drivers. It is commonly used in applications that require smart card authentication and secure communication. The vulnerability in the iasecc_parse_size function of OpenSC can lead to a heap buffer overflow, potentially allowing an attacker to execute arbitrary code or cause a denial-of-service condition.
Vulnerability Detail
The vulnerability arises from a heap-buffer-overflow read issue in the iasecc_parse_size function of OpenSC. This can be triggered when parsing a specific size value, leading to a read of one byte beyond the allocated buffer. An attacker can exploit this vulnerability by crafting a malicious input, potentially resulting in the execution of arbitrary code or a crash of the application. The vulnerability has a medium severity rating.
How To Fix
Minimum fixed version
fbda61d0d276dc98b9d1d1e6810bbd21d19e3859
This is the first release that contains the fix.
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Workaround
As a temporary workaround, users can disable or limit the usage of the affected functionality in their applications. This can help mitigate the risk of exploitation until a proper fix is applied. However, it is strongly advised to apply the official fix as soon as possible.
Conclusion
In conclusion, the iasecc_parse_size function in OpenSC is vulnerable to a heap-buffer-overflow read issue. This can potentially lead to the execution of arbitrary code or a denial-of-service condition. It is recommended to update the OpenSC package to a fixed version and apply the necessary patches. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
OpenSC is an open-source smart card library that provides cryptographic functions and smart card drivers.
This vulnerability can potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition.
To fix this vulnerability, update the OpenSC package to a version that includes the fix.
Yes, users can temporarily disable or limit the usage of the affected functionality.
You can find more information about this vulnerability in the OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=63587
References
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