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Loop with Unreachable Exit Condition ('Infinite Loop') Affecting ncurses package, versions <6.0+20160213-1ubuntu1+esm1

low

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.56% (78th percentile)
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NVD
7.5 high
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Red Hat
3.3 low

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  • Snyk ID SNYK-UBUNTU1604-NCURSES-367711
  • published 29 Aug 2017
  • disclosed 29 Aug 2017
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Introduced: 29 Aug 2017

CVE-2017-13728 Open this link in a new tab
CWE-835 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 ncurses to version 6.0+20160213-1ubuntu1+esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ncurses package and not the ncurses package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

There is an infinite loop in the next_char function in comp_scan.c in ncurses 6.0, related to libtic. A crafted input will lead to a remote denial of service attack.

References