CVE-2020-15866

Public Exploit

Description

mruby through 2.1.2-rc has a heap-based buffer overflow in the mrb_yield_with_class function in vm.c because of incorrect VM stack handling. It can be triggered via the stack_copy function.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.60%
Third-Party Advisory github.com Third-Party Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/mruby/mruby/issues/5042 third party advisory exploit
https://lists.debian.org/debian-lts-announce/2022/05/msg00006.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-15866?
CVE-2020-15866 has been scored as a critical severity vulnerability.
How to fix CVE-2020-15866?
To fix CVE-2020-15866, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15866 being actively exploited in the wild?
It is possible that CVE-2020-15866 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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