CVE-2019-20788 Integer overflow in n/a
An integer overflow in LibVNCServer's cursor handling allows attackers to trigger a heap-based buffer overflow, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-20788?
CVE-2019-20788 is a critical vulnerability in Canonical Ubuntu Linux, published on 23 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
Which versions are affected by CVE-2019-20788?
It affects 9 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Libvnc Project Libvncserver, Siemens Simatic Itc1500 Firmware, Siemens Simatic Itc1500 Pro Firmware, Siemens Simatic Itc1900 Firmware and 3 more.
How do I fix CVE-2019-20788?
Apply the vendor's patch.
Is CVE-2019-20788 being exploited?
There is no known exploitation of CVE-2019-20788 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2019-20788, GHSA-7397-jpw5-q274, MGASA-2020-0207, UBUNTU-CVE-2019-20788.