Bug 1395311 (CVE-2016-9575)

Summary: CVE-2016-9575 ipa: Insufficient permission check in certprofile-mod
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cbuissar, ftweedal, jcholast, pvoborni, rcritten, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: ipa 4.3.3, ipa 4.4.3 Doc Type: If docs needed, set a value
Doc Text:
It was found that IdM's certprofile-mod command did not properly check the user's permissions while modifying certificate profiles. An authenticated, unprivileged attacker could use this flaw to modify profiles to issue certificates with arbitrary naming or key usage information and subsequently use such certificates for other attacks.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2017-01-02 11:49:09 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1402810, 1402811, 1404718    
Bug Blocks: 1395316    
Attachments:
Description Flags
master, ipa-4-4, ipa-4-3, ipa-4-2 patch none

Description Adam Mariš 2016-11-15 16:23:34 UTC 
Due to a missing permission check, certprofile-mod can be used by an authenticated but unprivileged user to modify certificate profile configuration. This could allow the issuance of certificates with fraudulent subject naming information (allowing the holder of the private key to impersonate another entity), or inappropriate key usage or extended key usage information (use of certificate for unauthorised purposes e.g. code signing).

Affected versions : 4.2 and above (all versions supporting certificate profiles)

Upstream patch :
https://git.fedorahosted.org/cgit/freeipa.git/commit/?id=fec4c32ff15a96736740cf7d2f713a21af0b227e
Comment 1 Adam Mariš 2016-11-15 16:25:28 UTC 
Created attachment 1220871 [details]
master, ipa-4-4, ipa-4-3, ipa-4-2 patch
Comment 2 Fraser Tweedale 2016-11-16 01:09:51 UTC 
Credit for discovery goes to Liam Campbell (Red Hat).
Comment 3 Adam Mariš 2016-11-16 09:25:35 UTC 
Acknowledgments:

Name: Liam Campbell (Red Hat)
Comment 4 Adam Mariš 2016-11-23 14:28:05 UTC 
Comment on attachment 1220871 [details]
master, ipa-4-4, ipa-4-3, ipa-4-2 patch

For ipa-4-3 and ipa-4-2, following change is needed:

ipaserver/plugins/certprofile.py => ipalib/plugins/certprofile.py
Comment 12 Cedric Buissart 2016-12-14 13:39:29 UTC 
Created freeipa tracking bugs for this issue:

Affects: fedora-all [bug 1404718]
Comment 13 errata-xmlrpc 2017-01-02 10:54:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0001 https://rhn.redhat.com/errata/RHSA-2017-0001.html
Comment 14 Tomas Hoger 2018-03-13 20:21:17 UTC 
Fixed upstream in FreeIPA 4.4.3 and 4.3.3:

https://www.freeipa.org/page/Releases/4.4.3
https://www.freeipa.org/page/Releases/4.3.3