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Category:   Application (Generic)  >   Condor Vendors:   University of Wisconsin-Madison
(Red Hat Issues Fix) Condor Host-based Access Controls Can Be Bypased By Remote Users
SecurityTracker Alert ID:  1027401
SecurityTracker URL:  http://securitytracker.com/id/1027401
CVE Reference:   CVE-2012-3416   (Links to External Site)
Date:  Aug 14 2012
Impact:   User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 7.8.2
Description:   A vulnerability was reported in Condor. A remote user can bypass host-based access controls.

On systems that use host-based authentication, a remote user with control over the reverse-DNS entry of an IP host can bypass the target site's host-based authentication and perform privileged actions (e.g., ALLOW_ADMINISTRATOR or ALLOW_WRITE privileged actions).

Ken Hahn and Dan Bradley reported this vulnerability.

Impact:   A remote user can bypass host-based access controls.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2012-1169.html

Vendor URL:  research.cs.wisc.edu/condor/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Aug 14 2012 Condor Host-based Access Controls Can Be Bypased By Remote Users



 Source Message Contents

Subject:  [RHSA-2012:1169-01] Important: condor security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: condor security update
Advisory ID:       RHSA-2012:1169-01
Product:           Red Hat Enterprise MRG for RHEL-6
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1169.html
Issue date:        2012-08-14
CVE Names:         CVE-2012-3416 
=====================================================================

1. Summary:

Updated condor packages that fix one security issue are now available for
Red Hat Enterprise MRG 2.1 for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link in the References section.

2. Relevant releases/architectures:

MRG Grid Execute Node for RHEL 6 ComputeNode v.2 - x86_64
MRG Grid Execute Node for RHEL 6 Server v.2 - i386, x86_64
MRG Grid for RHEL 6 Server v.2 - i386, x86_64

3. Description:

Condor is a specialized workload management system for compute-intensive
jobs. It provides a job queuing mechanism, scheduling policy, priority
scheme, and resource monitoring and management.

Condor installations that rely solely upon host-based authentication were
vulnerable to an attacker who controls an IP, its reverse-DNS entry and has
knowledge of a target site's security configuration. With this control and
knowledge, the attacker could bypass the target site's host-based
authentication and be authorized to perform privileged actions (i.e.
actions requiring ALLOW_ADMINISTRATOR or ALLOW_WRITE). Condor deployments
using host-based authentication that contain no hostnames (IPs or IP globs
only) or use authentication stronger than host-based are not vulnerable.
(CVE-2012-3416)

Note: Condor will not run jobs as root; therefore, this flaw cannot lead to
a compromise of the root user account.

Red Hat would like to thank Ken Hahn and Dan Bradley for reporting this
issue.

All Red Hat Enterprise MRG 2.1 users are advised to upgrade to these
updated packages, which contain a backported patch to correct this issue.
Condor must be restarted for the update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

841175 - CVE-2012-3416 condor: host based authentication does not implement forward-confirmed reverse dns

6. Package List:

MRG Grid Execute Node for RHEL 6 ComputeNode v.2:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/RHEMRG-RHEL6/SRPMS/condor-7.6.5-0.14.2.el6_3.src.rpm

x86_64:
condor-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-classads-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-debuginfo-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-kbdd-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-qmf-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-vm-gahp-7.6.5-0.14.2.el6_3.x86_64.rpm

MRG Grid for RHEL 6 Server v.2:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHEMRG-RHEL6/SRPMS/condor-7.6.5-0.14.2.el6_3.src.rpm

i386:
condor-7.6.5-0.14.2.el6_3.i686.rpm
condor-aviary-7.6.5-0.14.2.el6_3.i686.rpm
condor-classads-7.6.5-0.14.2.el6_3.i686.rpm
condor-debuginfo-7.6.5-0.14.2.el6_3.i686.rpm
condor-kbdd-7.6.5-0.14.2.el6_3.i686.rpm
condor-plumage-7.6.5-0.14.2.el6_3.i686.rpm
condor-qmf-7.6.5-0.14.2.el6_3.i686.rpm

x86_64:
condor-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-aviary-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-classads-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-debuginfo-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-deltacloud-gahp-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-kbdd-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-plumage-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-qmf-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-vm-gahp-7.6.5-0.14.2.el6_3.x86_64.rpm

MRG Grid Execute Node for RHEL 6 Server v.2:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHEMRG-RHEL6/SRPMS/condor-7.6.5-0.14.2.el6_3.src.rpm

i386:
condor-7.6.5-0.14.2.el6_3.i686.rpm
condor-classads-7.6.5-0.14.2.el6_3.i686.rpm
condor-debuginfo-7.6.5-0.14.2.el6_3.i686.rpm
condor-kbdd-7.6.5-0.14.2.el6_3.i686.rpm
condor-qmf-7.6.5-0.14.2.el6_3.i686.rpm

x86_64:
condor-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-classads-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-debuginfo-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-kbdd-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-qmf-7.6.5-0.14.2.el6_3.x86_64.rpm
condor-vm-gahp-7.6.5-0.14.2.el6_3.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-3416.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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