Buffer overflow in Libvnc Project Libvncserver
CVE-2018-20020
LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.086 (94.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.086 · newest: 0.086 · change: 0.000
Affected products
- Libvnc Project Libvncserver
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 8.0, 9.0
- Libvnc — versions commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d
Weakness classification (CWE)
References
- www.debian.org/security/2019/dsa-4383 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/12/msg00017.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3877-1/ (vendor-advisory, Third Party Advisory)
- ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-li… (Third Party Advisory)
- security.gentoo.org/glsa/201908-05 (vendor-advisory)
- lists.debian.org/debian-lts-announce/2019/10/msg00042.html (mailing-list)
- lists.debian.org/debian-lts-announce/2019/11/msg00033.html (mailing-list)
- security.gentoo.org/glsa/202006-06 (vendor-advisory)
- usn.ubuntu.com/4547-1/ (vendor-advisory)
- usn.ubuntu.com/4547-2/ (vendor-advisory)
Frequently asked questions
- What is CVE-2018-20020?
- CVE-2018-20020 is a critical-severity vulnerability in Libvnc Project Libvncserver, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-12-19.
- How severe is CVE-2018-20020?
- Critical severity. CVSS v3 base score is 9.8 out of 10.