Vulnerability identifier: #VU16450

Vulnerability risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8580

CWE-ID: CWE-352

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft SharePoint Server
Server applications / Application servers

Vendor: Microsoft

Description
The vulnerability allows a remote authenticated attacker to perform cross-site search attacks.

The weakness exists due to insufficient CSRF protections in certain modes of the search function in Microsoft SharePoint Server. A remote attacker can create a specially crafted HTML page or URL, trick the victim into visiting it, induce the browser to invoke search queries as the logged in user through standard browser functionality to determine whether the query did return results or not, and thus by issuing targeted queries discover facts about documents that are searchable for the logged-in user.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2013 - 2016

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8580

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.