Vulnerability in mruby: UNKNOWN READ in mrb_bint_cmp
Summary
OSV-2022-556: UNKNOWN READ in mrb_bint_cmp. Affects mruby versions >= 872020bb3d85ba4066ec19cfcad375e51fdf024b, < 960021e51989881c06c7c87b2661440c1fb2a784. Fixed in 960021e51989881c06c7c87b2661440c1fb2a784. 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 is related to an UNKNOWN READ in the mrb_bint_cmp function. This function is responsible for comparing two bignum values in mruby. The vulnerability can potentially lead to crashes or undefined behavior when handling bignum comparisons.
Vulnerability Detail
The vulnerability arises due to an UNKNOWN READ operation in the mrb_bint_cmp function. This can result in crashes or undefined behavior when comparing bignum values in mruby. An attacker could potentially exploit this vulnerability to cause a denial-of-service condition or execute arbitrary code. The exact impact and potential attack vectors may vary depending on the specific usage of mruby in different applications.
How To Fix
Minimum fixed version
960021e51989881c06c7c87b2661440c1fb2a784
This is the first release that contains the fix.
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Workaround
There is no specific workaround available for this vulnerability. It is recommended to apply the fix mentioned in the 'how_to_fix' section by updating the mruby package to a patched version.
Conclusion
In conclusion, the vulnerability in mruby related to an UNKNOWN READ in mrb_bint_cmp can lead to crashes or undefined behavior when comparing bignum values. It is crucial to update the mruby package to a patched version to mitigate the risk of exploitation. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
mruby is a lightweight implementation of the Ruby programming language designed for embedding in other applications.
The vulnerability can lead to crashes or undefined behavior when comparing bignum values in mruby, potentially resulting in denial-of-service or arbitrary code execution.
To fix this vulnerability, update the mruby package to a version that includes the fix mentioned in the 'how_to_fix' section.
There is no specific workaround available for this vulnerability. It is recommended to apply the fix mentioned in the 'how_to_fix' section.
You can find more information about this vulnerability in the OSS-Fuzz report linked in the vulnerability details section.
References
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