Microsoft Edge/ChakraCore Chakra Scripting Engine memory corruption

CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.9 | $5k-$25k | 0.00 |
A vulnerability was found in Microsoft Edge and ChakraCore (Web Browser) (unknown version). It has been classified as critical. This affects an unknown code block 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 12/11/2018. The weakness was disclosed 12/11/2018 with Qihoo 360 Vulcan Team as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with Microsoft. This vulnerability is uniquely identified as CVE-2018-8618 since 03/14/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/18/2023). 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 119591 (KB4471332: Windows 10 Version 1809 and Windows Server 2019 December 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 91485 (Microsoft Edge Security Update for December 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 (119591) and SecurityFocus (BID 106113†). The entries VDB-127795, VDB-127796, VDB-127798 and VDB-127799 are pretty similar.
Product
Type
Vendor
Name
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 6.0VulDB 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: 🔍
CVSSv2
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Exploiting
Class: Memory corruptionCWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
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EPSS Percentile: 🔍
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Nessus ID: 119591
Nessus Name: KB4471332: Windows 10 Version 1809 and Windows Server 2019 December 2018 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
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Timeline
03/14/2018 🔍12/11/2018 🔍
12/11/2018 🔍
12/11/2018 🔍
12/11/2018 🔍
12/11/2018 🔍
12/11/2018 🔍
12/12/2018 🔍
06/18/2023 🔍
Sources
Vendor: microsoft.comAdvisory: portal.msrc.microsoft.com
Organization: Qihoo 360 Vulcan Team
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍
CVE: CVE-2018-8618 (🔍)
SecurityFocus: 106113 - Microsoft Edge Chakra Scripting Engine CVE-2018-8618 Remote Memory Corruption Vulnerability
See also: 🔍
Entry
Created: 12/12/2018 07:40 AMUpdated: 06/18/2023 07:42 AM
Changes: 12/12/2018 07:40 AM (84), 05/26/2020 04:36 PM (6), 06/18/2023 07:42 AM (4)
Complete: 🔍
Cache ID: 18:9E0:40
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