Use After Free in Mruby
CVE-2017-9527
The mark_context_stack function in gc.c in mruby through 1.2.0 allows attackers to cause a denial of service (heap-based use-after-free and application crash) or possibly have unspecified other impact via a crafted .rb file.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (60.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Mruby
- Debian Linux — versions 9.0
Weakness classification (CWE)
References
- github.com/mruby/mruby/issues/3486 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- github.com/mruby/mruby/commit/5c114c91d4ff31859fcd84cf8bf349b737b90d99 (Patch, Third Party Advisory, Issue Tracking)
- lists.debian.org/debian-lts-announce/2022/05/msg00006.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-9527?
- CVE-2017-9527 is a high-severity vulnerability in Mruby, classified under Use After Free. CVSS score: 7.8/10. Published 2017-06-11.
- How severe is CVE-2017-9527?
- High severity. CVSS v3 base score is 7.8 out of 10.