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zdiYu Haiwan and Wu HongJun from Nanyang Technological UniversityZDI-18-1408
HistoryDec 13, 2018 - 12:00 a.m.

Microsoft Windows JScript Array concat Uninitialized Pointer Remote Code Execution Vulnerability

2018-12-1300:00:00
Yu Haiwan and Wu HongJun from Nanyang Technological University
www.zerodayinitiative.com
8

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

7.6 High

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:H/Au:N/C:C/I:C/A:C

0.075 Low

EPSS

Percentile

94.1%

This vulnerability allows remote attackers to execute arbitrary code 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 Array.concat method in JScript. By creating an out-of-memory condition, an attacker can trigger access to a pointer prior to initialization. An attacker can leverage this vulnerability to execute code in the context of the current process.

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

7.6 High

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:H/Au:N/C:C/I:C/A:C

0.075 Low

EPSS

Percentile

94.1%