CVE-2016-0634

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-08-28 · updated 2026-06-17
Weakness: CWE-78

Description

The expansion of '\h' in the prompt string in bash 4.3 allows remote authenticated users to execute arbitrary code via shell metacharacters placed in 'hostname' of a machine.

Affected products

GNU Bash: 4.3

References

http://rhn.redhat.com/errata/RHSA-2017-0725.html
http://www.openwall.com/lists/oss-security/2016/09/16/12
http://www.openwall.com/lists/oss-security/2016/09/16/8
http://www.openwall.com/lists/oss-security/2016/09/18/11
http://www.openwall.com/lists/oss-security/2016/09/19/7
http://www.openwall.com/lists/oss-security/2016/09/20/1
http://www.openwall.com/lists/oss-security/2016/09/27/9
http://www.openwall.com/lists/oss-security/2016/09/29/27
http://www.openwall.com/lists/oss-security/2016/10/07/6
http://www.openwall.com/lists/oss-security/2016/10/10/3
http://www.openwall.com/lists/oss-security/2016/10/10/4
http://www.securityfocus.com/bid/92999

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