#VU82691 Server-Side Request Forgery (SSRF) in Microsoft Exchange Server
Published: November 2, 2023
Vulnerability identifier: #VU82691
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Microsoft Exchange Server
Microsoft Exchange Server
Software vendor:
Microsoft
Microsoft
Description
The disclosed vulnerability allows a remote user to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input within CreateAttachmentFromUr(), DownloadDataFromOfficeMarketPlace(), and DownloadDataFromUri() methods. A remote user can send a specially crafted HTTP request and force the application to initiate requests to arbitrary resources.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.