CVE-2019-8263 Memory corruption in UltraVNC
A stack-based buffer overflow in the UltraVNC client allows remote attackers to cause a denial of service via network connectivity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-8263?
CVE-2019-8263 is a medium-severity memory corruption vulnerability in Kaspersky Lab UltraVNC, published on 5 Mar 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.
Which versions are affected by CVE-2019-8263?
It affects 4 products.
Products include Siemens Sinumerik Access Mymachine\/P2p, Siemens Sinumerik Pcu Base Win10 Software\/Ipc, Siemens Sinumerik Pcu Base Win7 Software\/Ipc, Uvnc Ultravnc.
How do I fix CVE-2019-8263?
No fix has been published for CVE-2019-8263 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-2019-8263 being exploited?
There is no known exploitation of CVE-2019-8263 in the wild and no public exploit code.
Other vulnerabilities in Kaspersky Lab UltraVNC
Sources
Also known as GHSA-3ccg-xj7w-w764.