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Out-of-Bounds Affecting bash package, versions <4.3-1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.04% (6th percentile)
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NVD
7.8 high
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Red Hat
7 high

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  • Snyk ID SNYK-DEBIAN10-BASH-450811
  • published 23 Jun 2019
  • disclosed 18 Jun 2019
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Introduced: 18 Jun 2019

CVE-2012-6711 Open this link in a new tab
CWE-119 Open this link in a new tab

How to fix?

Upgrade Debian:10 bash to version 4.3-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bash package and not the bash package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

A heap-based buffer overflow exists in GNU Bash before 4.3 when wide characters, not supported by the current locale set in the LC_CTYPE environment variable, are printed through the echo built-in function. A local attacker, who can provide data to print through the "echo -e" built-in function, may use this flaw to crash a script or execute code with the privileges of the bash process. This occurs because ansicstr() in lib/sh/strtrans.c mishandles u32cconv().