Vulnerability identifier: #VU22958

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15683

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TurboVNC
Web applications / Modules and components for CMS

Vendor: TurboVNC

Description

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

The vulnerability exists due to a boundary error when stack frame is not protected with stack canary. A remote authenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TurboVNC: 0.1 - 2.2.2

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External links
http://github.com/TurboVNC/turbovnc/commit/cea98166008301e614e0d36776bf9435a536136e
http://ics-cert.kaspersky.com/reports/2019/11/22/vnc-vulnerability-research/

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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.