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Loop with Unreachable Exit Condition ('Infinite Loop') Affecting tightvnc package, versions <1.3.9-6.5+deb8u1build0.14.04.1~esm1

Severity

 Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.88% (83rd percentile)

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  • Snyk IDSNYK-UBUNTU1404-TIGHTVNC-1651286
  • published19 Dec 2018
  • disclosed19 Dec 2018
Report a new vulnerability Found a mistake?

Introduced: 19 Dec 2018

CVE-2018-20021  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Ubuntu:14.04 tightvnc to version 1.3.9-6.5+deb8u1build0.14.04.1~esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tightvnc package and not the tightvnc package as distributed by Ubuntu. See How to fix? for Ubuntu:14.04 relevant fixed versions and status.

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