Out-of-bounds Read in Mruby
CVE-2018-12248
An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.015 · change: -0.000
Affected products
- Mruby — versions 1.4.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mruby/mruby/issues/4038 (Third Party Advisory, Issue Tracking)
- github.com/mruby/mruby/commit/778500563a9f7ceba996937dc886bd8cde29b42b (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-12248?
- CVE-2018-12248 is a high-severity vulnerability in Mruby, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2018-06-12.
- How severe is CVE-2018-12248?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-12248 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.