Microsoft Edge/ChakraCore Chakra Scripting Engine memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.9$5k-$25k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Microsoft Edge and ChakraCore. Affected is an unknown function of the component Chakra Scripting Engine. The manipulation results in memory corruption. This vulnerability was named CVE-2018-8556. The attack may be performed from remote. There is no available exploit. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Edge and ChakraCore (Web Browser) (affected version unknown). It has been classified as critical. Affected is an unknown functionality of the component Chakra Scripting Engine. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 11/13/2018. The weakness was presented 11/13/2018 with Qihoo 360 Vulcan Team as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release was coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2018-8556 since 03/14/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/05/2023). The advisory points out:

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

The vulnerability scanner Nessus provides a plugin with the ID 118916 (KB4467691: Windows 10 Version 1607 and Windows Server 2016 November 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 91479 (Microsoft Edge Security Update for November 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 (118916) and SecurityFocus (BID 105779†). See VDB-126703, VDB-126704, VDB-126705 and VDB-126706 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 4.2
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 118916
Nessus Name: KB4467691: Windows 10 Version 1607 and Windows Server 2016 November 2018 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

03/14/2018 🔍
11/13/2018 +244 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/14/2018 +1 days 🔍
06/05/2023 +1664 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Organization: Qihoo 360 Vulcan Team
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8556 (🔍)
GCVE (CVE): GCVE-0-2018-8556
GCVE (VulDB): GCVE-100-126708
SecurityFocus: 105779 - Microsoft ChakraCore Scripting Engine CVE-2018-8556 Remote Memory Corruption Vulnerability
SecurityTracker: 1042107

See also: 🔍

Entryinfo

Created: 11/14/2018 08:04
Updated: 06/05/2023 18:58
Changes: 11/14/2018 08:04 (84), 05/26/2020 16:29 (6), 06/05/2023 18:58 (5)
Complete: 🔍
Cache ID: 216::103

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