Vulnerability 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.
CVSS Score
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mruby | Mruby | <= 2.1.1 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://github.com/mruby/mruby/issues/5042ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00006.htmlMailing ListThird Party Advisory
- https://github.com/mruby/mruby/issues/5042ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00006.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2020-15866?
CVE-2020-15866 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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.
How severe is CVE-2020-15866?
CVE-2020-15866 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2020-15866?
Check the references section above for vendor advisories and patch information. Affected products include: Mruby Mruby, Debian Debian Linux.