Bug 1595566 (CVE-2018-12559)

Summary: CVE-2018-12559 cantata: Directory traversal due to insufficient mount target check in mounter.cpp
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: i, rdieter
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: If docs needed, set a value
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Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-10 10:30:33 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: 1595571    
Bug Blocks:    

Description Andrej Nemec 2018-06-27 07:39:35 UTC
An issue was discovered in the cantata-mounter D-Bus service in Cantata through 2.3.1. The mount target path check in mounter.cpp `mpOk()` is insufficient. A regular user can consequently mount a CIFS filesystem anywhere (e.g., outside of the /home directory tree) by passing directory traversal sequences such as a home/../usr substring.



Upstream patch:


Comment 1 Andrej Nemec 2018-06-27 07:44:04 UTC
Created cantata tracking bugs for this issue:

Affects: fedora-all [bug 1595571]

Comment 2 Product Security DevOps Team 2019-06-10 10:30:33 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.