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Bug 1927428

Summary: snapd: Access restriction could be bypassed by container management snaps
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: go-sig, maciek.borzecki, me, ngompa13
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Clone Of: Environment:
Last Closed: 2021-02-10 22:09:58 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: 1927431, 1927432    
Bug Blocks:    

Description Pedro Sampaio 2021-02-10 17:25:46 UTC
Snapd did not correctly specify cgroup delegation when generating systemd service units for various container management snaps. This could allow a local attacker to escalate privileges via access to arbitrary devices of the container host from within a compromised or malicious container.

References:

https://packetstormsecurity.com/files/161359/USN-4728-1.txt

Comment 1 Pedro Sampaio 2021-02-10 17:27:38 UTC
Created snapd tracking bugs for this issue:

Affects: epel-all [bug 1927432]
Affects: fedora-all [bug 1927431]

Comment 2 Product Security DevOps Team 2021-02-10 22:09:58 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.