// For flags

CVE-2018-8491

Microsoft Internet Explorer WebCrypto importKey Use-After-Free Information Disclosure Vulnerability

Severity Score

7.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory, aka "Internet Explorer Memory Corruption Vulnerability." This affects Internet Explorer 11. This CVE ID is unique from CVE-2018-8460.

Existe una vulnerabilidad de ejecución remota de código cuando Internet Explorer accede incorrectamente a los objetos en la memoria. Esto también se conoce como "Internet Explorer Memory Corruption Vulnerability". Esto afecta a Internet Explorer 11. El ID de este CVE es diferente de CVE-2018-8460.

This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the processing of imported keys in WebCrypto. By performing actions in JavaScript, an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process.

*Credits: Simon Zuckerbraun of Trend Micro Zero Day Initiative
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2018-03-14 CVE Reserved
  • 2018-10-10 CVE Published
  • 2024-08-05 CVE Updated
  • 2024-09-19 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows 10
Search vendor "Microsoft" for product "Windows 10"
--
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows 10
Search vendor "Microsoft" for product "Windows 10"
1607
Search vendor "Microsoft" for product "Windows 10" and version "1607"
-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows 10
Search vendor "Microsoft" for product "Windows 10"
1703
Search vendor "Microsoft" for product "Windows 10" and version "1703"
-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows 10
Search vendor "Microsoft" for product "Windows 10"
1709
Search vendor "Microsoft" for product "Windows 10" and version "1709"
-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows 10
Search vendor "Microsoft" for product "Windows 10"
1803
Search vendor "Microsoft" for product "Windows 10" and version "1803"
-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows 10
Search vendor "Microsoft" for product "Windows 10"
1809
Search vendor "Microsoft" for product "Windows 10" and version "1809"
-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows 7
Search vendor "Microsoft" for product "Windows 7"
-sp1
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows 8.1
Search vendor "Microsoft" for product "Windows 8.1"
--
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Rt 8.1
Search vendor "Microsoft" for product "Windows Rt 8.1"
--
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2008
Search vendor "Microsoft" for product "Windows Server 2008"
r2
Search vendor "Microsoft" for product "Windows Server 2008" and version "r2"
sp1, x64
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2012
Search vendor "Microsoft" for product "Windows Server 2012"
r2
Search vendor "Microsoft" for product "Windows Server 2012" and version "r2"
-
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2016
Search vendor "Microsoft" for product "Windows Server 2016"
--
Safe
Microsoft
Search vendor "Microsoft"
Internet Explorer
Search vendor "Microsoft" for product "Internet Explorer"
11
Search vendor "Microsoft" for product "Internet Explorer" and version "11"
-
Affected
in Microsoft
Search vendor "Microsoft"
Windows Server 2019
Search vendor "Microsoft" for product "Windows Server 2019"
--
Safe