NULL pointer dereference in TightVNC - CVE-2019-15680
Published: October 31, 2019 / Updated: February 9, 2022
Vulnerability identifier: #VU22438
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-15680
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GlavSoft LLC
Affected software:
TightVNC
TightVNC
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in "zlib.c" in the "HandleZlibBPP" function. A remote attacker can trigger denial of service conditions via network connectivity.
How to mitigate CVE-2019-15680
Install update from vendor's website.