Buffer overflow in Ruby-Lang Ruby
CVE-2016-2338
An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby. In Psych::Emitter start_document function heap buffer "head" allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.047 (91.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.047 · newest: 0.047 · change: +0.001
Affected products
- Ruby-Lang Ruby — versions 2.2.2, 2.3.0
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.debian.org/debian-lts-announce/2020/03/msg00032.html (mailing-list, Mailing List, Third Party Advisory)
- www.talosintelligence.com/reports/TALOS-2016-0032/ (Exploit, Third Party Advisory)
- security.netapp.com/advisory/ntap-20221228-0005/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2016-2338?
- CVE-2016-2338 is a critical-severity vulnerability in Ruby-Lang Ruby, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-09-29.
- How severe is CVE-2016-2338?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2016-2338 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.