VNC: TurboVNC Fence Message Stack-based Buffer Overflow
This signature detects attempts to exploit a known vulnerability against TurboVNC. A successful attack can lead to a buffer overflow and arbitrary remote code execution within the context of the server.
Extended Description
TurboVNC server code contains stack buffer overflow vulnerability in commit prior to cea98166008301e614e0d36776bf9435a536136e. This could possibly result into remote code execution, since stack frame is not protected with stack canary. This attack appear to be exploitable via network connectivity. To exploit this vulnerability authorization on server is required. These issues have been fixed in commit cea98166008301e614e0d36776bf9435a536136e.
Affected Products
Turbovnc turbovnc
References
CVE: CVE-2019-15683
Short Name
VNC:TURBOVNC-FENCE-OF
Severity
Major
Recommended
False
Recommended Action
Drop
Category
VNC
Keywords
Buffer CVE-2019-15683 Fence Message Overflow Stack-based TurboVNC
Release Date
01/16/2020
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3337
False Positive
Unknown
Vendors
Turbovnc
CVSS Score
7.5