Vulnerability identifier: #VU22438

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15680

CWE-ID: CWE-476

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 perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in "zlib.c" in the "HandleZlibBPP" function. A remote attacker can trigger denial of service conditions via network connectivity.

Mitigation
Install update from vendor's website.

Vulnerable software versions

TightVNC: 1.3.10

---

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

---

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.