CVE-2018-12247 Information

Description

An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class related to certain .clone usage because mrb_obj_clone in kernel.c copies flags other than the MRB_FLAG_IS_FROZEN flag (e.g. the embedded flag).

CVSS Vector

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

Reference

https://github.com/mruby/mruby/commit/55edae0226409de25e59922807cb09acb45731a2 https://github.com/mruby/mruby/issues/4036

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5