Vulnerability in Libvnc Project Libvncserver
CVE-2018-20021
LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerability allows attacker to consume excessive amount of resources like CPU and RAM
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.035 (88.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · 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 c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c
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)
- ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-031-li… (Third Party Advisory)
- usn.ubuntu.com/3877-1/ (vendor-advisory, 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)
- lists.debian.org/debian-lts-announce/2019/12/msg00028.html (mailing-list)
- security.gentoo.org/glsa/202006-06 (vendor-advisory)
- usn.ubuntu.com/4547-1/ (vendor-advisory)
Frequently asked questions
- What is CVE-2018-20021?
- CVE-2018-20021 is a high-severity vulnerability in Libvnc Project Libvncserver, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2018-12-19.
- How severe is CVE-2018-20021?
- High severity. CVSS v3 base score is 7.5 out of 10.