Insecure DLL loading in Microsoft Visual Studio

Published: 2019-03-13 | Updated: 2019-03-13
Severity High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-0809
CWE ID CWE-427
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software Visual Studio Subscribe
Vendor Microsoft

Security Advisory

This security advisory describes one high risk vulnerability.

1) Insecure DLL loading

Severity: High

CVSSv3: 8.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-0809

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner in Visual Studio C++ Redistributable Installer. A remote attacker can place a specially crafted .dll file on a remote SMB fileshare, trick the victim into opening a file, associated with the vulnerable application, and execute arbitrary code on victim's system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Visual Studio: 2017 version 15.9

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0809

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