#VU17622 Code Injection in Microsoft SharePoint Server and Microsoft SharePoint Foundation - CVE-2019-0604

Vulnerability identifier: #VU17622

Vulnerability risk: High

CVSSv4.0: 9.4 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/U:Amber]

CVE-ID: CVE-2019-0604

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft SharePoint Server
Server applications / Application servers
Microsoft SharePoint Foundation
Server applications / Application servers

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing source code markup of an application package. A remote attacker with ability to upload a malicious package to the SharePoint server can execute it on the system in the context of the SharePoint application pool and the SharePoint server farm account.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires privileges to upload application packages.

Note: this vulnerability is being actively exploited in the wild since April 23.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2010 - 2019

Microsoft SharePoint Foundation: 2013

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0604
https://www.ncsc.gov.sa/wps/portal/ncsc/home/Alerts/!ut/p/z1/lVLRboJAEPwaH8kud-cBj2elYKkxYgpyLwYR67V...
https://pastebin.com/bUFPhucz
https://otx.alienvault.com/pulse/5cd3f89df12b501c477a6fba

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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?

Yes. This vulnerability is being exploited in the wild.