Information disclosure in Microsoft SharePoint Server

1) Path traversal

EUVDB-ID: #VU24028

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-1491

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request to the SharePoint Server instance and read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2016 - 2019

Microsoft SharePoint Foundation: 2010 Service Pack 2 - 2013 Service Pack 1

CPE2.3

• cpe:2.3:a:microsoft:microsoft_sharepoint_server:2016:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sharepoint_server:2019:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sharepoint_foundation:2010 Service Pack 2:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sharepoint_server:2013:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sharepoint_foundation:2013 Service Pack 1:*:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1491

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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