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OS Command Injection Affecting bash package, versions <0:4.2.45-5.el7_0.2

critical

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    Exploit Maturity Mature
    EPSS 97.56% (100th percentile)
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NVD
9.8 critical
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Red Hat
7.3 high

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  • Snyk ID SNYK-CENTOS7-BASH-2037156
  • published 26 Jul 2021
  • disclosed 24 Sep 2014
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Introduced: 24 Sep 2014

CVE-2014-6271 Open this link in a new tab
CWE-78 Open this link in a new tab

How to fix?

Upgrade Centos:7 bash to version 0:4.2.45-5.el7_0.2 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 Centos. See How to fix? for Centos:7 relevant fixed versions and status.

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution, aka "ShellShock." NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.

References