Bug 1848143 (CVE-2020-13867)

Summary:	CVE-2020-13867 targetcli: weak permissions for /etc/target and backup files
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amctagga, andy, anharris, bniver, flucifre, gmeno, hvyas, mbenjamin, mhackett, mlombard, vereddy
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	targetcli-fb 2.1.53	Doc Type:	If docs needed, set a value
Doc Text:	An access flaw was found in targetcli, where the `/etc/target` and underneath backup directory/files were world-readable. This flaw allows a local attacker to access potentially sensitive information such as authentication credentials from the /etc/target/saveconfig.json and backup files. The highest threat from this vulnerability is to confidentiality.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:26:03 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:	1845167, 1848144, 1852768, 1853645, 1853646
Bug Blocks:	1848145

Description Guilherme de Almeida Suckevicz 2020-06-17 19:02:40 UTC

Open-iSCSI targetcli-fb through 2.1.52 has weak permissions for /etc/target (and for the backup directory and backup files).

Reference and upstream commit:
https://github.com/open-iscsi/targetcli-fb/pull/172

Comment 1 Guilherme de Almeida Suckevicz 2020-06-17 19:02:57 UTC

Created targetcli tracking bugs for this issue:

Affects: fedora-all [bug 1848144]

Comment 2 Hardik Vyas 2020-07-01 09:10:10 UTC

Statement:

The version of targetcli shipped with Red Hat Ceph Storage 3 sets the world-readable permissions for `/etc/target` and `/etc/target/backup` directory that store the sensitive information, hence affected by this vulnerability.

Comment 5 Cedric Buissart 2020-07-03 14:09:29 UTC

Mitigation:

$ chmod -R og-rwx /etc/target

Future backup files will still be created with incorrect permissions, but attackers will not be able to access the target directory.

Comment 10 Product Security DevOps Team 2020-11-04 02:26:03 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-13867

Comment 11 errata-xmlrpc 2020-11-04 03:06:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4697 https://access.redhat.com/errata/RHSA-2020:4697

Comment 12 errata-xmlrpc 2020-12-15 11:10:20 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:5434 https://access.redhat.com/errata/RHSA-2020:5434