Access of Uninitialized Pointer in mruby - CVE-2018-11743
Published: June 5, 2018 / Updated: August 8, 2020
Vulnerability identifier: #VU37083
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2018-11743
CWE-ID: CWE-824
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: mruby
Affected software:
mruby
mruby
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The init_copy function in kernel.c in mruby 1.4.1 makes initialize_copy calls for TT_ICLASS objects, which allows attackers to cause a denial of service (mrb_hash_keys uninitialized pointer and application crash) or possibly have unspecified other impact.
How to mitigate CVE-2018-11743
Install update from vendor's website.