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zdiHexKitchenZDI-21-911
HistoryJul 30, 2021 - 12:00 a.m.

Trend Micro Apex One Incorrect Permission Preservation Authentication Bypass Vulnerability

2021-07-3000:00:00
HexKitchen
www.zerodayinitiative.com
40

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

0.01 Low

EPSS

Percentile

83.5%

This vulnerability allows remote attackers to bypass authentication on affected installations of Trend Micro Apex One. Authentication as a low-privileged Windows domain user is required to exploit this vulnerability. The specific flaw exists within the product patching functionality. When applying a patch to the product, the permissions on some files are not properly preserved. An attacker can leverage this vulnerability to bypass authentication on the system.

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

0.01 Low

EPSS

Percentile

83.5%

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