Bug 1191575 – CVE-2015-0267 kexec-tools: insecure use of /tmp/*$$* filenames

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Bug 1191575 - (CVE-2015-0267) CVE-2015-0267 kexec-tools: insecure use of /tmp/*$$* filenames

Summary:	CVE-2015-0267 kexec-tools: insecure use of /tmp/$$ filenames

Status:	CLOSED ERRATA

Aliases:	CVE-2015-0267

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20150210,repor...
Keywords:	Security

Depends On:	1213342 1213343 1213344
Blocks:	1191577
	Show dependency tree / graph

Reported:	2015-02-11 09:24 EST by Vasyl Kaigorodov
Modified:	2015-05-12 14:45 EDT (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	It was found that the module-setup.sh script provided by kexec-tools created temporary files in an insecure way. A malicious, local user could use this flaw to conduct a symbolic link attack, allowing them to overwrite the contents of arbitrary files.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-05-12 14:45:34 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
proposed patch (2.57 KB, text/plain) 2015-04-15 08:23 EDT, Ján Rusnačko	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2015:0986	normal	SHIPPED_LIVE	Moderate: kexec-tools security, bug fix, and enhancement update	2015-05-12 17:53:37 EDT

Groups: None (edit)

Description Vasyl Kaigorodov 2015-02-11 09:24:21 EST

Harald Hoyer from Red Hat reported that /usr/lib/dracut/modules.d/99kdumpbase/module-setup.sh script uses insecure temporary files names, which can lead to a persistent local denial of service, or allow local users to escalate their privileges.

Comment 1 Ján Rusnačko 2015-04-15 08:23:16 EDT

Created attachment 1014711 [details]
proposed patch

Comment 2 Ján Rusnačko 2015-04-15 08:33:30 EDT

Acknowledgements:

This issue was discovered by Harald Hoyer of Red Hat.

Comment 5 Florian Weimer 2015-04-20 06:59:35 EDT

Created kexec-tools tracking bugs for this issue:

Affects: fedora-all [bug 1213342]

Comment 6 errata-xmlrpc 2015-05-12 13:53:53 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:0986 https://rhn.redhat.com/errata/RHSA-2015-0986.html

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