Bug 1377613 (CVE-2016-0634)

Summary:	CVE-2016-0634 bash: Arbitrary code execution via malicious hostname
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	admiller, dominik.mierzejewski, kdudka, sardella, slawomir, svashisht, yselkowi
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An arbitrary command injection flaw was found in the way bash processed the hostname value. A malicious DHCP server could use this flaw to execute arbitrary commands on the DHCP client machines running bash under specific circumstances.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:58:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1377614, 1378456, 1379237, 1400793
Bug Blocks:	1377615, 1386080

Description Andrej Nemec 2016-09-20 08:31:58 UTC

A vulnerability was found in a way bash expands the $HOSTNAME. Injecting the hostname with malicious code would cause it to run each time bash expanded \h in the prompt string.

References:

http://seclists.org/oss-sec/2016/q3/528

Ubuntu bug:

https://bugs.launchpad.net/ubuntu/+source/bash/+bug/1507025

Comment 1 Andrej Nemec 2016-09-20 08:32:21 UTC

Created bash tracking bugs for this issue:

Affects: fedora-all [bug 1377614]

Comment 3 Dhiru Kholia 2016-09-21 11:34:08 UTC

Upstream patch (for bash 4.3):

http://openwall.com/lists/oss-security/2016/09/16/18

Comment 9 Fedora Update System 2016-09-23 16:19:08 UTC

bash-4.3.42-6.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2016-09-24 15:13:35 UTC

bash-4.3.43-3.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2016-09-25 20:49:18 UTC

bash-4.3.42-4.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 16 Martin Prpič 2016-09-28 06:42:26 UTC

An upstream patch was posted to oss-security that fixes this issue:

http://seclists.org/oss-sec/2016/q3/538

Comment 17 Adam Mariš 2016-10-10 11:04:02 UTC

Now in upstream repo:

https://ftp.gnu.org/gnu/bash/bash-4.3-patches/bash43-047

Comment 20 errata-xmlrpc 2017-03-21 11:14:23 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:0725 https://rhn.redhat.com/errata/RHSA-2017-0725.html

Comment 21 errata-xmlrpc 2017-08-01 20:33:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1931 https://access.redhat.com/errata/RHSA-2017:1931