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CVE-2018-20021

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Date: December 19, 2018

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

Language: C

Severity Score

Related Resources (17)

https://usn.ubuntu.com/3877-1/
https://security-tracker.debian.org/tracker/CVE-2018-20021
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-031-libvnc-infinite-loop/
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
https://usn.ubuntu.com/4547-1/
https://usn.ubuntu.com/4547-2/
https://www.debian.org/security/2019/dsa-4383
https://security.gentoo.org/glsa/201908-05
https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html
https://security.gentoo.org/glsa/202006-06
https://nvd.nist.gov/vuln/detail/CVE-2018-20021
https://usn.ubuntu.com/4587-1/
https://people.canonical.com/~ubuntu-security/cve/CVE-2018-20021
https://access.redhat.com/security/cve/CVE-2018-20021
https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
https://www.mend.io/vulnerability-database/CVE-2018-20021

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Loop with Unreachable Exit Condition ('Infinite Loop')

CWE-835

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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