Vulnerability identifier: #VU21657

Vulnerability risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-1372

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Azure App Service on Azure Stack
Server applications / Other server solutions

Vendor: Microsoft

Description

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

The vulnerability exists due to a boundary error in Azure App Service/ Antares on Azure Stack. A remote authenticated user can use an unprivileged function to execute arbitrary code in the context of NT AUTHORITY\system thereby escaping the Sandbox.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install the App Service on Azure Stack Update 7 build number 84.0.2.10

Vulnerable software versions

Azure App Service on Azure Stack: All versions

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1372
http://docs.microsoft.com/en-us/azure-stack/operator/azure-stack-app-service-release-notes-update-s...

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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. However, proof of concept for this vulnerability is available.