CVE-2018-10191

Name	CVE-2018-10191
Description	In versions of mruby up to and including 1.4.0, an integer overflow exists in src/vm.c::mrb_vm_exec() when handling OP_GETUPVAR in the presence of deep scope nesting, resulting in a use-after-free. An attacker that can cause Ruby code to be run can use this to possibly execute arbitrary code.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2996-1
Debian Bugs	896020

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mruby (PTS)	buster	2.0.0-1	fixed
	bullseye	2.1.2-3	fixed
	bookworm	3.1.0-3	fixed
	sid, trixie	3.3.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
mruby	source	stretch	1.2.0+20161228+git30d5424a-1+deb9u1		DLA-2996-1
mruby	source	(unstable)	1.4.0+20180418+git54905e98-1			896020

Notes

[jessie] - mruby <no-dsa> (Minor issue)
https://github.com/mruby/mruby/issues/3995
https://github.com/mruby/mruby/commit/1905091634a6a2925c911484434448e568330626