VulnerabilityModified
CVE-2020-15866
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.
CRITICAL 9.8EPSS 2.09%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.09%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a 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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.09% probability · 81th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- mruby/mruby · debian/debian linux
- Source
- cve@mitre.org
References
- https://github.com/mruby/mruby/issues/5042Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00006.htmlMailing List, Third Party Advisory
- https://github.com/mruby/mruby/issues/5042Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00006.htmlMailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.