CVE-2019-8259 Information disclosure in UltraVNC
An attacker can read stack memory via network connectivity to disclose information and bypass ASLR in UltraVNC client.
- 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-2019-8259?
CVE-2019-8259 is a high-severity 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 contains multiple memory leaks (CWE-655) in VNC client code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1199.
Which versions are affected by CVE-2019-8259?
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-2019-8259?
No fix has been published for CVE-2019-8259 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-8259 being exploited?
There is no known exploitation of CVE-2019-8259 in the wild and no public exploit code.
Other vulnerabilities in UltraVNC
Sources
Also known as GHSA-mhxq-j55c-q97g.