PT-2019-5744 · Tightvnc+4 · Tightvnc+4

Pavel Cheremushkin · Published 2019-10-29 · Updated 2020-12-09 · CVE-2019-15680

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions TightVNC version 1.3.10

Description The issue is related to a null pointer dereference in the HandleZlibBPP function, which can result in a Denial of System (DoS). This can be exploited via network connectivity, potentially allowing a remote attacker to cause a service disruption.

Recommendations For TightVNC version 1.3.10, consider disabling the HandleZlibBPP function as a temporary workaround until a patch is available. Restrict access to the network to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2021-01302

CVE-2019-15680

DLA-2045-1

SUSE-SU-2019:14235-1

SUSE-SU-2019_14235-1

USN-4407-1

Affected Products

Debian

Linuxmint

Suse

Tightvnc

Ubuntu

References · 32

• https://nvd.nist.gov/vuln/detail/CVE-2019-15680 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-15680 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15680 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-01302 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2019:14235-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-15680 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4407-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4407-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-15680 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-15680 · Vendor Advisory
• https://usn.ubuntu.com/4407-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-15680 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15681 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15690 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2045-1 · Vendor Advisory