CVE-2016-7543: Input Validation
First published: Tue Sep 27 2016(Updated: )
Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS and PS4 environment variables.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/bash | <4.4 | 4.4 |
| GNU Bash | <=4.3 | |
| Fedora | =23 | |
| Fedora | =24 | |
| Fedora | =25 |
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Reference Links
- http://rhn.redhat.com/errata/RHSA-2017-0725.html
- http://www.openwall.com/lists/oss-security/2016/09/26/9
- http://www.securityfocus.com/bid/93183
- http://www.securitytracker.com/id/1037812
- https://access.redhat.com/errata/RHSA-2017:1931
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05388115
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F7XOQSHU63Y357NHU5FPTFBM6I3YOCQB/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OU3C756YPHDAAPFX76UGZBAQQQ5UMHS5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z2VRBSIPZDZ75ZQ2DLITHUIDW4W26KVR/
- https://lists.gnu.org/archive/html/bug-bash/2016-09/msg00018.html
- https://security.gentoo.org/glsa/201701-02
- http://seclists.org/oss-sec/2016/q3/617
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1379634
- http://lists.gnu.org/archive/html/bug-bash/2016-10/msg00009.html
- https://rhn.redhat.com/errata/RHSA-2017-0725.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1379630
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OU3C756YPHDAAPFX76UGZBAQQQ5UMHS5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7XOQSHU63Y357NHU5FPTFBM6I3YOCQB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2VRBSIPZDZ75ZQ2DLITHUIDW4W26KVR/
Frequently Asked Questions
What is the severity of CVE-2016-7543?
CVE-2016-7543 has been classified as a critical vulnerability due to the potential for local users to execute arbitrary commands with root privileges.
How do I fix CVE-2016-7543?
To remediate CVE-2016-7543, upgrade your Bash version to 4.4 or later.
What versions of Bash are affected by CVE-2016-7543?
CVE-2016-7543 affects Bash versions before 4.4.
Can CVE-2016-7543 be exploited remotely?
CVE-2016-7543 cannot be exploited remotely as it requires local user access to the system.
Which operating systems are affected by CVE-2016-7543?
CVE-2016-7543 affects several Fedora versions, including 23, 24, and 25, along with other systems running vulnerable Bash versions.
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