CVE-2019-8261CWE-125

UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow

published March 5, 2019

CVSS
—
EPSS
2%
Percentile
82.7
In the wild
Unconfirmed
What it is

⚠️ There's a sneaky out-of-bounds read waiting in UltraVNC's client CoRRE decoder! This vulnerability arises from a multiplication overflow, making it exploitable via network connectivity. 🔥 Think of it like a recipe that accidentally calls for too much of an ingredient — instead of just spilling over the bowl, it could splash onto the floor and cause a slippery mess! In this case, the data leak from the decoder could lead to unpredictable results. An attacker could potentially read sensitive data or cause unexpected behavior in the VNC client, which is absolutely devastating when dealing with remote systems. While there's no known exploitation occurring, leaving it unpatched could invite trouble in the future!

Put simply

Think of it like a recipe that accidentally calls for too much of an ingredient — instead of just spilling over the bowl, it could splash onto the floor and cause a slippery mess! In this case, the data leak from the decoder could lead to unpredictable results. This vulnerability in UltraVNC revision 1199 occurs due to an out-of-bounds read caused by a multiplication overflow in the CoRRE decoder. It allows attackers to access data outside of the allocated memory space when exploiting the VNC connection.

What to do

An attacker could potentially read sensitive data or cause unexpected behavior in the VNC client, which is absolutely devastating when dealing with remote systems. While there's no known exploitation occurring, leaving it unpatched could invite trouble in the future! Update your UltraVNC to revision 1200 immediately to patch this vulnerability. Make sure to review your configurations to ensure safe network connectivity. Regularly monitor for any updates or patches to maintain security! You've got this! With these steps, you'll keep your systems secure and running smoothly. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02243 · 82.7th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2019-03-05T15:00Z
EPSS history
Timeline
  • 05 MAR 15:00Z
    UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow
    cvelistv5