Use-of-uninitialized-value in mruby: udiv
Summary
OSV-2022-652: Use-of-uninitialized-value in udiv. Affects mruby versions >= 547d465340b5358502483a97729a95661bcd754d. No fix is published. How to fix ↓
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Background
mruby is an open-source lightweight implementation of the Ruby programming language. It is designed to be embedded in other applications and provides a minimalistic and efficient runtime environment. The vulnerability identified in mruby involves the use of an uninitialized value in the udiv function. This vulnerability can lead to crashes and potentially be exploited by attackers to execute arbitrary code or cause denial of service.
Vulnerability Detail
The vulnerability arises from the use of an uninitialized value in the udiv function of mruby. This can result in undefined behavior and crashes when the function is invoked. Attackers may be able to exploit this vulnerability to execute arbitrary code or cause denial of service. The issue was reported through the OSS-Fuzz project, and more details can be found in the provided link. The severity of this vulnerability is considered medium.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, developers can manually initialize the value used in the udiv function to a safe default value before invoking the function. This can help mitigate the risk of crashes or potential exploitation. Here is an example of how the value can be initialized:
// Initialize the value
int value = 0;
// Call the udiv function with the initialized value
udiv(value);
Conclusion
The use-of-uninitialized-value vulnerability in mruby's udiv function can lead to crashes and potential code execution or denial of service. It is crucial to update to a patched version of mruby to mitigate this vulnerability. For further assistance with vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for mruby →
FAQ
mruby is a lightweight implementation of the Ruby programming language designed for embedding in other applications.
The vulnerability can lead to crashes and potentially allow attackers to execute arbitrary code or cause denial of service.
This vulnerability was reported through the OSS-Fuzz project, which focuses on fuzzing and identifying vulnerabilities in open-source software.
The severity of this vulnerability is considered medium.
To fix this vulnerability, update your mruby installation to a version that includes the necessary patch.
References
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