OS Command Injection Affecting bash-doc package, versions <0:4.2.46-28.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-RHEL7-BASHDOC-5173839
- published26 Jul 2021
- disclosed16 Oct 2015
Introduced: 16 Oct 2015
CVE-2016-0634 (opens in a new tab)How to fix?
Upgrade RHEL:7 bash-doc to version 0:4.2.46-28.el7 or higher.
This issue was patched in RHSA-2017:1931.
NVD Description
Note: Versions mentioned in the description apply only to the upstream bash-doc package and not the bash-doc package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
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.
References
- http://www.securityfocus.com/bid/92999
- https://bugzilla.redhat.com/show_bug.cgi?id=1377613
- https://access.redhat.com/security/cve/CVE-2016-0634
- https://security.gentoo.org/glsa/201612-39
- 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://rhn.redhat.com/errata/RHSA-2017-0725.html
- https://access.redhat.com/errata/RHSA-2017:1931