// For flags

CVE-2018-0987

Microsoft Windows JScript defineProperty Use-After-Free Information Disclosure Vulnerability

Severity Score

4.3
*CVSS v3

Exploit Likelihood

4.6%
*EPSS

Affected Versions

13
*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An information disclosure vulnerability exists when the scripting engine does not properly handle objects in memory in Internet Explorer, aka "Scripting Engine Information Disclosure Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-0981, CVE-2018-0989, CVE-2018-1000.

Existe una vulnerabilidad de divulgación de información cuando el motor de scripting no gestiona correctamente los objetos en la memoria en Internet Explorer. Esto también se conoce como "Scripting Engine Information Disclosure Vulnerability". Esto afecta a Internet Explorer 9, Internet Explorer 11 e Internet Explorer 10. El ID de este CVE es diferente de CVE-2018-0981, CVE-2018-0989 y CVE-2018-1000.

This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft Windows JScript. 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 implementation of the defineProperty method. By performing actions in JScript, 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 arbitrary code in the context of the current process.

*Credits: Anonymous
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2017-12-01 CVE Reserved
  • 2018-04-11 CVE Published
  • 2024-08-05 CVE Updated
  • 2025-04-06 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
References (3)
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions (13)