High severity · published Jun 12, 2018
CVE-2018-12247
An issue was discovered in mruby 1.4.1
7.5
CVSS
1.5%
EPSS
No
On KEV
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
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MR
Mruby · Mruby
1.4.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-12247
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-12247
Patch
https://github.com/mruby/mruby/commit/55edae0226409de25e59922807cb09acb45731a2
Issue Tracking
https://github.com/mruby/mruby/issues/4036
More from Mruby
9.8
CVE-2022-1286
heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2
9.8
CVE-2022-1276
Out-of-bounds Read in mrb_get_args in GitHub repository mruby/mruby prior to 3.2
9.8
CVE-2022-1212
Use-After-Free in str_escape in mruby/mruby in GitHub repository mruby/mruby prior to 3.2
9.8
CVE-2022-0631
Heap-based Buffer Overflow in Homebrew mruby prior to 3.2
9.8
CVE-2022-0570
Heap-based Buffer Overflow in Homebrew mruby prior to 3.2