CVE-2018-10191
9.8
CRITICAL
CVSS 3.1
EPSS 1.3%
Description
In versions of mruby up to and including 1.4.0, an integer overflow exists in src/vm.c::mrb_vm_exec() when handling OP_GETUPVAR in the presence of deep scope nesting, resulting in a use-after-free. An attacker that can cause Ruby code to be run can use this to possibly execute arbitrary code.
How to fix CVE-2018-10191
To remediate CVE-2018-10191, upgrade the affected package to a fixed version below.
- Debian/mruby—upgrade to 1.4.0+20180418+git54905e98-1 or later
Is CVE-2018-10191 being exploited?
Low — EPSS is 1.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.4.0+20180418+git54905e98-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |