High severity · published Dec 19, 2018
CVE-2018-20021
LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code
7.5
CVSS
3.4%
EPSS
No
On KEV
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:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.4% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0 · source: NVD
LI
Libvncserver · Libvnc Project
before 0.9.12 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 18.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20021
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-20021
Third Party Advisory
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-031-libvnc-infinite-loop/
Mailing List
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
security.gentoo.org
https://security.gentoo.org/glsa/201908-05
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