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zdiDA-0x43-Dx4-DA-Hx2-Tx2-TP-S-Q from GTSCZDI-22-1595
HistoryOct 17, 2022 - 12:00 a.m.

Microsoft Exchange Autodiscover Server-Side Request Forgery Privilege Escalation Vulnerability

2022-10-1700:00:00
DA-0x43-Dx4-DA-Hx2-Tx2-TP-S-Q from GTSC
www.zerodayinitiative.com
22

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

0.966 High

EPSS

Percentile

99.6%

This vulnerability allows remote attackers to escalate privileges on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The specific flaw exists within the Autodiscover service. The issue results from the lack of proper validation of a URI prior to accessing resources. An attacker can leverage this vulnerability to escalate privileges to resources normally protected from the user.

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

0.966 High

EPSS

Percentile

99.6%