CVE-2016-0634

Name: CVE-2016-0634
Creator: NVD / NIST
Published: 2017-08-28T15:29:01.487+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 6.07%

Last modified Jun 17, 2026

CVE-2016-0634 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 6.07% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

6.07%

92.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Gnu	Bash	4.3

References

http://rhn.redhat.com/errata/RHSA-2017-0725.html
http://www.openwall.com/lists/oss-security/2016/09/16/12Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/16/8Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/18/11Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/19/7Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/20/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/27/9Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/29/27Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/07/6Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/10/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/10/4Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/92999Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:1931
https://bugzilla.redhat.com/show_bug.cgi?id=1377613Issue Tracking, Patch, Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201612-39Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0725.html
http://www.openwall.com/lists/oss-security/2016/09/16/12Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/16/8Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/18/11Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/19/7Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/20/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/27/9Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/29/27Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/07/6Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/10/3Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/10/4Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/92999Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:1931
https://bugzilla.redhat.com/show_bug.cgi?id=1377613Issue Tracking, Patch, Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201612-39Third Party Advisory

Timeline

Published: Aug 28, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-0634?

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.

How severe is CVE-2016-0634?

Severity scoring for CVE-2016-0634 is pending analysis. The EPSS model estimates a 6.07% probability of exploitation in the next 30 days.

How do I fix CVE-2016-0634?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST