VDB-119439 · CVE-2018-8243 · BID 104403

Microsoft ChakraCore Scripting Engine memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft ChakraCore. It has been classified as critical. Affected by this issue is some unknown functionality of the component Scripting Engine. Performing a manipulation results in memory corruption. This vulnerability is cataloged as CVE-2018-8243. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft ChakraCore (Web Browser) (unknown version). This affects an unknown code block of the component 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 summary by CVE is:

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore. This CVE ID is unique from CVE-2018-8267.

The bug was discovered 06/12/2018. The weakness was shared 06/12/2018 by exp-sky with Tencent as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The vendor cooperated in the coordination of the public release. This vulnerability is uniquely identified as CVE-2018-8243 since 03/14/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The advisory points out:

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory. 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.

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 vulnerability database at SecurityFocus (BID 104403†). Be aware that VulDB is the high quality source 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: 7.5
VulDB Meta Temp Score: 7.4

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

Vendor Base Score (Microsoft): 8.8
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

03/14/2018 🔍
06/12/2018 +90 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
06/12/2018 +0 days 🔍
06/13/2018 +1 days 🔍
06/14/2018 +0 days 🔍
02/18/2020 +614 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Researcher: exp-sky
Organization: Tencent
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8243 (🔍)
GCVE (CVE): GCVE-0-2018-8243
GCVE (VulDB): GCVE-100-119439

OVAL: 🔍

SecurityFocus: 104403 - Microsoft ChakraCore Scripting Engine CVE-2018-8243 Remote Memory Corruption Vulnerability

Entryinfo

Created: 06/13/2018 18:22
Updated: 02/18/2020 17:11
Changes: 06/13/2018 18:22 (72), 02/18/2020 17:11 (7)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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