Vulnerability identifier: #VU22435

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15678

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

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

Vendor: GlavSoft LLC

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error in rfbServerCutText handler when processing untrusted input. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

TightVNC: 1.3.10

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External links
http://www.openwall.com/lists/oss-security/2018/12/10/5

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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.