Bug 1406729 – CVE-2016-9595 katello-debug: Possible symlink attacks due to use of predictable file names

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Bug 1406729 - (CVE-2016-9595) CVE-2016-9595 katello-debug: Possible symlink attacks due to use of predictable file names

Summary:	CVE-2016-9595 katello-debug: Possible symlink attacks due to use of predictab...

Status:	NEW

Aliases:	CVE-2016-9595

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=20161221,repor...
Keywords:	Security

Depends On:	1405387 1414114 1414115
Blocks:	1432305
	Show dependency tree / graph

Reported:	2016-12-21 05:48 EST by Adam Mariš
Modified:	2018-07-27 04:55 EDT (History)
CC List:	8 users (show)

See Also:
Fixed In Version:	katello 3.4.0
Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in katello-debug where certain scripts and log files used insecure temporary files. A local user could exploit this flaw to conduct a symbolic-link attack, allowing them to overwrite the contents of arbitrary files.
Story Points:	---
Clone Of:
Environment:
Last Closed:
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
patch for the issue. (1.71 KB, patch) 2017-02-17 18:04 EST, Bryan Kearney	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:0336	normal	SHIPPED_LIVE	Important: Satellite 6.3 security, bug fix, and enhancement update	2018-02-21 17:43:42 EST

Groups: None (edit)

Description Adam Mariš 2016-12-21 05:48:43 EST

Evgeni Golov of Red Hat reports:


It was found that katello-debug.sh uses static, perfectly guessable paths in /tmp for its temporary files, which can lead to symlink attacks on /tmp/tasks_export.log and /tmp/pulp_running_tasks.js leading to overwritten files anywhere on the system (as katello-debug is run via sos as root), or code execution inside of mongo via /tmp/pulp_running_tasks.js if $user pre-creates that file and overwrites the file after command is echoed there, modifying it at his own will before calling mongo on it.

Product bug:

https://bugzilla.redhat.com/show_bug.cgi?id=1405387

Comment 2 Bryan Kearney 2017-02-17 18:04 EST

Created attachment 1255095 [details]
patch for the issue.

Comment 3 Kurt Seifried 2017-07-14 21:59:37 EDT

Acknowledgments:

Name: Evgeni Golov (Red Hat)

Comment 5 errata-xmlrpc 2018-02-21 07:25:28 EST

This issue has been addressed in the following products:

  Red Hat Satellite 6.3 for RHEL 7

Via RHSA-2018:0336 https://access.redhat.com/errata/RHSA-2018:0336

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