CVE-2018-20021 — Infinite Loop in Project Libvncserver

CWE-835 — Infinite LoopCWE-400 — Uncontrolled Resource Consumption15 documents8 sources
Severity
7.5HIGHNVD
OSV9.8
EPSS
2.6%
top 14.48%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Libvncserver Project LibvncserverTightvncLibvnc Project Libvncserver+2 more
Timeline
PublishedDec 19
Latest updateMay 13

Description

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

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶Debianlibvncserver_project/libvncserver< 0.9.11+dfsg-1.2+3
▶Debiantightvnc/tightvnc< 1:1.3.9-9.1+3

Also affects: Debian Linux 8.0, 9.0, Ubuntu Linux 14.04, 16.04, 18.04, 18.10

🔴Vulnerability Details

5
GHSA
GHSA-m4r6-9jrx-9hxw: LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code↗2022-05-13
▶
OSV
ssvnc vulnerabilities↗2020-09-28
▶
OSV
italc vulnerabilities↗2020-09-28
▶
OSV
CVE-2018-20021: LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code↗2018-12-19
▶
CVEList
CVE-2018-20021: LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code↗2018-12-19
▶

📋Vendor Advisories

6
Ubuntu
iTALC vulnerabilities↗2020-10-20
▶
Ubuntu
iTALC vulnerabilities↗2020-09-28
▶
Ubuntu
SSVNC vulnerabilities↗2020-09-28
▶
Ubuntu
LibVNCServer vulnerabilities↗2019-01-31
▶
Red Hat
libvncserver: Infinite loop in VNC client code allows for denial of service↗2018-12-19
▶

💬Community

3
Bugzilla
CVE-2018-20021 libvncserver: Infinite loop in VNC client code allows for denial of service [fedora-all]↗2018-12-20
▶
Bugzilla
CVE-2018-20021 libvncserver: Infinite loop in VNC client code allows for denial of service [epel-7]↗2018-12-20
▶
Bugzilla
CVE-2018-20021 libvncserver: Infinite loop in VNC client code allows for denial of service↗2018-12-20
▶
CVE-2018-20021 — Infinite Loop in Project Libvncserver | cvebase