CVE-2016-2338

CRITICAL

Ruby - Out-of-Bounds Write

Title source: rule

Description

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.

Exploits (1)

nomisec WORKING POC

by SpiralBL0CK · poc

https://github.com/SpiralBL0CK/CVE-2016-2338-nday

View Code ZIP pw:eip

References (3)

[Exploit, Third Party Advisory] http://www.talosintelligence.com/reports/TALOS-2016-0032/

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2020/03/msg00032.html

[Third Party Advisory] https://security.netapp.com/advisory/ntap-20221228-0005/

Scores

CVSS v3 9.8

EPSS 0.1346

EPSS Percentile 94.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-787

Status published

Products (3)

debian/debian_linux 8.0

ruby-lang/ruby 2.2.2

ruby-lang/ruby 2.3.0

Published Sep 29, 2022

Tracked Since Feb 18, 2026