Microsoft Edge/ChakraCore Scripting Engine information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Microsoft Edge and ChakraCore. Impacted is an unknown function of the component Scripting Engine. The manipulation leads to information disclosure. This vulnerability is referenced as CVE-2018-0939. Remote exploitation of the attack is possible. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Microsoft Edge and ChakraCore (Web Browser) (affected version not known). It has been rated as problematic. This issue affects some unknown functionality of the component Scripting Engine. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

ChakraCore and Microsoft Edge in Windows 10 1703 and 1709 allow information disclosure, due to how the scripting engine handles objects in memory, aka "Scripting Engine Information Disclosure Vulnerability". This CVE ID is unique from CVE-2018-0891.

The bug was discovered 03/13/2018. The weakness was published 03/13/2018 by Security Team (window) as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The identification of this vulnerability is CVE-2018-0939 since 12/01/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK. The advisory points out:

An information disclosure vulnerability exists when the scripting engine does not properly handle objects in memory in Microsoft Edge. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system.

The vulnerability scanner Nessus provides a plugin with the ID 108286 (KB4088782: Windows 10 Version 1703 March 2018 Security Update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91437 (Microsoft Edge Security Update for March 2018).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (108286) and SecurityFocus (BID 103305†). Similar entries are available at VDB-114501, VDB-114502, VDB-114503 and VDB-114505. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 4.3
Vendor Vector (Microsoft): 🔍

NVD Base Score: 4.3
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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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Nessus ID: 108286
Nessus Name: KB4088782: Windows 10 Version 1703 March 2018 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 831303
OpenVAS Name: Microsoft Windows Multiple Vulnerabilities (KB4088782)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

12/01/2017 🔍
03/13/2018 +102 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/14/2018 +1 days 🔍
03/14/2018 +0 days 🔍
02/04/2021 +1058 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Researcher: Security Team (window)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0939 (🔍)
GCVE (CVE): GCVE-0-2018-0939
GCVE (VulDB): GCVE-100-114515

OVAL: 🔍

SecurityFocus: 103305 - Microsoft ChakraCore Scripting Engine CVE-2018-0939 Information Disclosure Vulnerability
SecurityTracker: 1040507

See also: 🔍

Entryinfo

Created: 03/14/2018 10:26
Updated: 02/04/2021 16:18
Changes: 03/14/2018 10:26 (85), 01/13/2020 11:23 (7), 02/04/2021 16:18 (2)
Complete: 🔍
Cache ID: 216::103

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