Double Free in TigerVNC - CVE-2017-7393
Published: April 1, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU39305
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-7393
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote authenticated user to execute arbitrary code.
In TigerVNC 1.7.1 (VNCSConnectionST.cxx VNCSConnectionST::fence), an authenticated client can cause a double free, leading to denial of service or potentially code execution.
Affected software
TigerVNC
Fedora
tigervnc
Fedora
tigervnc
How to mitigate CVE-2017-7393
Install update from vendor's website.
tigervnc - addressed in versions 1.7.1-3.fc25, 1.7.1-4.fc24, 1.7.1-4.fc26