Advisory Details

October 17th, 2022

Microsoft Exchange Autodiscover Server-Side Request Forgery Privilege Escalation Vulnerability

ZDI-22-1595
ZDI-CAN-18802

CVE ID CVE-2022-41040
CVSS SCORE 6.3, (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Exchange
VULNERABILITY DETAILS

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.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040
DISCLOSURE TIMELINE
  • 2022-09-09 - Vulnerability reported to vendor
  • 2022-10-17 - Coordinated public release of advisory
  • 2022-11-18 - Advisory Updated
CREDIT DA-0x43-Dx4-DA-Hx2-Tx2-TP-S-Q from GTSC
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