Bug 1267580 (CVE-2015-5292) - CVE-2015-5292 sssd: memory leak in the sssd_pac_plugin
Summary: CVE-2015-5292 sssd: memory leak in the sssd_pac_plugin
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2015-5292
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1266404 1267176 1268783 1268807
Blocks: 1267581
TreeView+ depends on / blocked
 
Reported: 2015-09-30 13:11 UTC by Martin Prpič
Modified: 2021-02-17 04:53 UTC (History)
29 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was found that SSSD's Privilege Attribute Certificate (PAC) responder plug-in would leak a small amount of memory on each authentication request. A remote attacker could potentially use this flaw to exhaust all available memory on the system by making repeated requests to a Kerberized daemon application configured to authenticate using the PAC responder plug-in.
Clone Of:
Environment:
Last Closed: 2017-01-10 15:01:10 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:2019 0 normal SHIPPED_LIVE Low: sssd security and bug fix update 2015-11-10 18:00:44 UTC
Red Hat Product Errata RHSA-2015:2355 0 normal SHIPPED_LIVE Low: sssd security, bug fix, and enhancement update 2015-11-19 10:27:42 UTC

Description Martin Prpič 2015-09-30 13:11:09 UTC 
A memory leak was found in the sssd_pac_plugin (sssd_pac_plugin.so library), which is distributed with the sssd_client package.

Original report with additional details:

https://fedorahosted.org/sssd/ticket/2803

Patch:

https://fedorahosted.org/sssd/attachment/ticket/2803/0001-Fix-memory-leak-in-sssdpac_verify.patch
Comment 5 Martin Prpič 2015-10-05 10:38:04 UTC 
Created sssd tracking bugs for this issue:

Affects: fedora-all [bug 1268807]
Comment 6 Fedora Update System 2015-10-11 16:03:45 UTC 
sssd-1.13.1-2.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 12 Fedora Update System 2015-10-20 01:54:39 UTC 
sssd-1.13.1-2.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 13 Fedora Update System 2015-10-20 02:53:42 UTC 
sssd-1.12.5-4.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
Comment 14 Martin Prpič 2015-10-20 13:05:21 UTC 
Analysis:

The issue is in the PAC responder that's provided with SSSD. When an application is configured to use Kerberos and authenticate against SSSD's PAC responder, the responder leaks a small amount of memory on every authentication attempt. This could allow an attacker to eventually exhaust all available memory on the system by sending numerous auth requests to a running application (daemon) configured as stated above.

The vulnerable code is detailed in https://fedorahosted.org/sssd/ticket/2803
Comment 16 errata-xmlrpc 2015-11-10 13:01:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2015:2019 https://rhn.redhat.com/errata/RHSA-2015-2019.html
Comment 17 errata-xmlrpc 2015-11-19 11:40:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2355 https://rhn.redhat.com/errata/RHSA-2015-2355.html
Note You need to log in before you can comment on or make changes to this bug.