Bug 1793302 (CVE-2020-1706) - CVE-2020-1706 openshift/apb-tools: /etc/passwd is given incorrect privileges
Summary: CVE-2020-1706 openshift/apb-tools: /etc/passwd is given incorrect privileges
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-1706
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1793364 1793365 1793366 1793367
Blocks: 1776664
TreeView+ depends on / blocked
 
Reported: 2020-01-21 06:20 UTC by Mark Cooper
Modified: 2022-10-02 21:50 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
An insecure modification vulnerability in the /etc/passwd file was found in the openshift/apb-tools. An attacker with access to the container could use this flaw to modify /etc/passwd and escalate their privileges.
Clone Of:
Environment:
Last Closed: 2020-06-03 11:20:31 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:2305 0 None None None 2020-06-03 09:41:55 UTC
Red Hat Product Errata RHSA-2020:2442 0 None None None 2020-06-17 20:17:34 UTC

Description Mark Cooper 2020-01-21 06:20:58 UTC 
It has been found that multiple containers modify the permissions of /etc/passwd to make them modifiable by users other than root. An attacker with access to the running container can exploit this to modify /etc/passwd to add a user and escalate their privileges. This CVE is specific to the openshift/apb-tools-container.

Original bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1791534
Comment 1 Mark Cooper 2020-01-21 06:21:01 UTC 
Statement:

By default this vulnerability is not exploitable in un-privilieged containers running on OpenShift Container Platform. This is because the system call SETUID and SETGID is blocked by the default seccomp policy.
Comment 4 Mark Cooper 2020-01-22 03:22:43 UTC 
Acknowledgments:

Name: Joseph LaMagna-Reiter (SPR Inc.)
Comment 10 errata-xmlrpc 2020-06-03 09:41:52 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.2

Via RHSA-2020:2305 https://access.redhat.com/errata/RHSA-2020:2305
Comment 11 Product Security DevOps Team 2020-06-03 11:20:31 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-2020-1706
Comment 12 errata-xmlrpc 2020-06-17 20:17:33 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.3

Via RHSA-2020:2442 https://access.redhat.com/errata/RHSA-2020:2442
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