OS Command Injection Affecting bash package, versions <4.3-14ubuntu1.2
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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Test your applications- Snyk IDSNYK-UBUNTU1604-BASH-351541
- published28 Aug 2017
- disclosed28 Aug 2017
Introduced: 28 Aug 2017
CVE-2016-0634 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 bash to version 4.3-14ubuntu1.2 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 Ubuntu.
See How to fix? for Ubuntu:16.04 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://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-0634
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0634
- https://security-tracker.debian.org/tracker/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
- https://bugzilla.redhat.com/show_bug.cgi?id=1377613
- http://rhn.redhat.com/errata/RHSA-2017-0725.html
- https://access.redhat.com/errata/RHSA-2017:1931
- http://www.securityfocus.com/bid/92999