Bug 1252805 (CVE-2015-5189) - CVE-2015-5189 pcs: Incorrect authorization when using pcs web UI
Summary: CVE-2015-5189 pcs: Incorrect authorization when using pcs web UI
Alias: CVE-2015-5189
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: Engineering1253287 Engineering1253288 Engineering1253289 Engineering1253290
Blocks: Embargoed1252818
TreeView+ depends on / blocked
Reported: 2015-08-12 09:24 UTC by Adam Mariš
Modified: 2023-05-12 18:33 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A race condition was found in the way the pcsd web UI backend performed authorization of user requests. An attacker could use this flaw to send a request that would be evaluated as originating from a different user, potentially allowing the attacker to perform actions with permissions of a more privileged user.
Clone Of:
Last Closed: 2015-09-01 14:04:16 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:1700 0 normal SHIPPED_LIVE Important: pcs security update 2015-09-01 17:41:46 UTC

Description Adam Mariš 2015-08-12 09:24:21 UTC
It was reported that it's possible to get access as a different user when using pcsd (the pcs web UI) due to using a variable which is global to the server instead of the connection to validate usernames.

Scenario is following:
User A sends a command to pcsd, after the connection is made and authentication
happens, (but before any security checks are done), User B connects and authenticates. User A could potentially get access based on User B's permissions.

To take advantage of this the user must have access to login to pcsd.

Comment 3 Ján Rusnačko 2015-08-14 12:26:41 UTC

This issue was discovered by Tomáš Jelínek of Red Hat.

Comment 4 errata-xmlrpc 2015-09-01 13:42:11 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2015:1700 https://rhn.redhat.com/errata/RHSA-2015-1700.html

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