Bug 1409556 (CVE-2016-9646)

Summary: CVE-2016-9646 ikiwiki: Commit metadata forgery
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: ktdreyer, thomas.moschny
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: ikiwiki 3.20161229 Doc Type: If docs needed, set a value
Doc Text:
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Clone Of: Environment:
Last Closed: 2019-06-08 03:04:58 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1406695, 1406696    
Bug Blocks:    

Description Andrej Nemec 2017-01-02 13:20:20 UTC 
CGI::FormBuilder->field has a context-dependent API, similar to the CGI->param API that led to Bugzilla's CVE-2014-1572. Parts of ikiwiki incorrectly called this method in list context when a scalar result, which could lead to two relatively minor attacks: 

In the comments plugin, an attacker who was able to post a comment could give it a user-specified author and author-URL even if the wiki configuration did not allow for that, by crafting multiple values to other fields. Also, in the editpage plugin, an attacker who was able to edit a page could potentially forge commit authorship by crafting multiple values for the rcsinfo field.

References:

http://seclists.org/oss-sec/2016/q4/778
Comment 1 Andrej Nemec 2017-01-02 13:36:35 UTC 
Created ikiwiki tracking bugs for this issue:

Affects: fedora-all [bug 1406695]
Affects: epel-6 [bug 1406696]
Comment 2 Product Security DevOps Team 2019-06-08 03:04:58 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.