mruby 1.4.1 mrb_class null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in mruby 1.4.1. This issue affects the function mrb_class. The manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2018-12247. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in mruby 1.4.1 (Programming Language Software). This issue affects the function mrb_class. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

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).

The bug was discovered 06/06/2018. The weakness was disclosed 06/12/2018 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2018-12247 since 06/12/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 6 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.

The entries VDB-119389 and VDB-119388 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

06/06/2018 🔍
06/12/2018 +5 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
03/22/2023 +1744 days 🔍

Sourcesinfo

Product: github.com

Advisory: 55edae0226409de25e59922807cb09acb45731a2
Status: Not defined

CVE: CVE-2018-12247 (🔍)
GCVE (CVE): GCVE-0-2018-12247
GCVE (VulDB): GCVE-100-119387
See also: 🔍

Entryinfo

Created: 06/12/2018 21:45
Updated: 03/22/2023 15:42
Changes: 06/12/2018 21:45 (57), 02/18/2020 11:54 (1), 03/22/2023 15:42 (4)
Complete: 🔍
Cache ID: 216:BAB:103

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

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