CVE-2016-2339 Information

Description

An exploitable heap overflow vulnerability exists in the Fiddle::Function.new \initialize\ function functionality of Ruby. In Fiddle::Function.new \initialize\ heap buffer \arg_types\ allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.securityfocus.com/bid/91234 http://www.talosintelligence.com/reports/TALOS-2016-0034/ https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8