Multiple vulnerabilities in Microsoft SharePoint



Published: 2019-11-12
Severity Medium
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2019-1443
CVE-2019-1442
CWE ID CWE-434
CWE-451
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Microsoft SharePoint Foundation
Server applications / Application servers

Microsoft SharePoint Server
Server applications / Application servers

Vendor Microsoft

Security Advisory

1) Arbitrary file upload

Severity: Medium

CVSSv3: 4.6 [CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-1443

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to the way SharePoint server handles file uploads. A remote authenticated user can upload a specially crafted file to the server and use it to obtain SMB hashes.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Foundation: 2010 Service Pack 2, 2013

Microsoft SharePoint Server: 2016, 2019

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1443

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.

2) Spoofing attack

Severity: Low

CVSSv3: 2.7 [CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1442

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of certain URLs. A remote attacker can create a specially crafted file, force the victim into opening it and then trick a victim into entering credentials that can be obtained by the attacker.

Successful exploitation of the vulnerability may allow to conduct a phishing attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2019

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1442

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.