CVE-2018-15361 Memory corruption in UltraVNC

Critical 9.8 Published 5 Mar 2019 Updated 16 Sep 2024

A buffer underflow in the UltraVNC client allows remote attackers to execute arbitrary code via network connectivity.

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-2018-15361?

CVE-2018-15361 is a critical memory corruption vulnerability in UltraVNC, published on 5 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

UltraVNC revision 1198 has a buffer underflow vulnerability in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1199.

Weakness: CWE-787, CWE-124

Which versions are affected by CVE-2018-15361?

It affects 1 product.

Products include Uvnc Ultravnc.

How do I fix CVE-2018-15361?

No fix has been published for CVE-2018-15361 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-2018-15361 being exploited?

There is no known exploitation of CVE-2018-15361 in the wild and no public exploit code.

Sources

Also known as GHSA-5g7c-7pq7-39h8.