VDB-118963 · CVE-2018-11743 · GCVE-0-2018-11743

mruby 1.4.1 kernel.c init_copy uninitialized pointer

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in mruby 1.4.1. It has been classified as critical. This impacts the function init_copy of the file kernel.c. This manipulation causes uninitialized pointer. This vulnerability appears as CVE-2018-11743. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in mruby 1.4.1 (Programming Language Software). Affected by this vulnerability is the function init_copy of the file kernel.c. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. The CWE definition for the vulnerability is CWE-824. The product accesses or uses a pointer that has not been initialized. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The bug was discovered 05/29/2018. The weakness was presented 06/05/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2018-11743 since 06/05/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Programming Language Software

Name

mruby

Version

1.4.1

License

open-source

Website

Product: https://github.com/mruby/mruby/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Uninitialized pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

05/29/2018 🔍
06/05/2018 +6 days 🔍
06/05/2018 +0 days 🔍
06/05/2018 +0 days 🔍
06/05/2018 +0 days 🔍
03/21/2023 +1750 days 🔍

Sourcesinfo

Product: github.com

Advisory: b64ce17852b180dfeea81cf458660be41a78974d
Status: Not defined

CVE: CVE-2018-11743 (🔍)
GCVE (CVE): GCVE-0-2018-11743
GCVE (VulDB): GCVE-100-118963

Entryinfo

Created: 06/05/2018 22:06
Updated: 03/21/2023 16:33
Changes: 06/05/2018 22:06 (58), 02/15/2020 09:02 (1), 03/21/2023 16:25 (4), 03/21/2023 16:33 (1)
Complete: 🔍
Cache ID: 216::103