CVE-2019-8266 Memory corruption in UltraVNC
Out-of-bounds access in UltraVNC client allows remote code execution via network connectivity, requiring user interaction.
- 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-2019-8266?
CVE-2019-8266 is a critical 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 multiple out-of-bounds access vulnerabilities connected with improper usage of ClientConnection::Copybuffer function in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. User interaction is required to trigger these vulnerabilities. These vulnerabilities have been fixed in revision 1208.
Which versions are affected by CVE-2019-8266?
It affects 1 product.
Products include Uvnc Ultravnc.
How do I fix CVE-2019-8266?
No fix has been published for CVE-2019-8266 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-2019-8266 being exploited?
There is no known exploitation of CVE-2019-8266 in the wild and no public exploit code.
Other vulnerabilities in Kaspersky Lab UltraVNC
Sources
Also known as GHSA-h88h-84v5-wrjr.