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K
zdiTencent Security Team EtherZDI-17-325
HistoryMay 10, 2017 - 12:00 a.m.

(Pwn2Own) Microsoft Edge WriteClassesOfCategory DLL Planting Sandbox Escape Vulnerability

2017-05-1000:00:00
Tencent Security Team Ether
www.zerodayinitiative.com
13

8.3 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

5.1 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.003 Low

EPSS

Percentile

68.7%

This vulnerability allows remote attackers to escape the AppContainer sandbox on vulnerable installations of Microsoft Edge. 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 IBrowserBroker::WriteClassesOfCategory method. Executing this method can cause the broker process to load a module from an unqualified path. An attacker can leverage this in conjunction with other vulnerabilities to execute code under the context of the user at medium integrity.

8.3 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

5.1 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.003 Low

EPSS

Percentile

68.7%