Vulnerability Details : CVE-2018-12247
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).
Vulnerability category: Memory Corruption
Products affected by CVE-2018-12247
- cpe:2.3:a:mruby:mruby:1.4.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-12247
0.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 41 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-12247
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2018-12247
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-12247
-
https://github.com/mruby/mruby/issues/4036
Null pointer dereference in mrb_class · Issue #4036 · mruby/mruby · GitHubIssue Tracking;Third Party Advisory
-
https://github.com/mruby/mruby/commit/55edae0226409de25e59922807cb09acb45731a2
Allow `Object#clone` to copy frozen status only; fix #4036 · mruby/mruby@55edae0 · GitHubPatch;Third Party Advisory
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