Bug 796438 (CVE-2012-1012)

Summary: CVE-2012-1012 krb5: flaw in access control handling for strings in kadmin
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: dpal, jplans, nalin, nathaniel, prc
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2012-02-22 22:10:23 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Blocks: 796440    

Description Vincent Danen 2012-02-22 21:35:04 UTC 
It was reported [1] that, within the kadmin protocol, the access controls for get_strings/set_string were insufficient; anyone with global list privileges could get or modify string attributed on any principal.

It was also noted that the exposure depends on how generous the kadmind acl was with list permissions and whether or not string attributes were used in deployment (and noting that nothing in the core code uses them yet).

This has been fixed upstream [2] and in Fedora [3].


[1] http://krbdev.mit.edu/rt/Ticket/Display.html?user=guest&pass=guest&id=7093
[2] http://src.mit.edu/fisheye/changelog/krb5/?cs=25704
[3] http://koji.fedoraproject.org/koji/buildinfo?buildID=300840
Comment 1 Vincent Danen 2012-02-22 22:10:23 UTC 
This flaw was introduced in krb5 1.10, so only affected Fedora 17 (in current development).  It has been fixed there; earlier versions of Fedora or Red Hat Enterprise Linux are not affected.


Statement:

Not vulnerable. This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 4, 5, or 6.