CVE-2019-8267 Memory corruption in UltraVNC

High 7.5 Published 9 Mar 2019 Updated 16 Sep 2024

An out-of-bounds read in the UltraVNC client's TextChat module allows remote attackers to cause a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-8267?

CVE-2019-8267 is a high-severity memory corruption vulnerability in Kaspersky Lab UltraVNC, published on 9 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

UltraVNC revision 1207 has out-of-bounds read vulnerability in VNC client code inside TextChat module, which results in a denial of service (DoS) condition. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1208.

Weakness: CWE-125

Which versions are affected by CVE-2019-8267?

It affects 1 product.

Products include Uvnc Ultravnc.

How do I fix CVE-2019-8267?

No fix has been published for CVE-2019-8267 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-8267 being exploited?

There is no known exploitation of CVE-2019-8267 in the wild and no public exploit code.

Sources

Also known as GHSA-qmfh-w398-4w9j.