Cluster takeover via permissive daemon socket
Published Sep 6, 2022 · Updated Aug 3, 2024
Privilege escalation in ClusterLabs PCS 0.10.5 through 0.10.14 and 0.11.0 through 0.11.3 allows local users to control a cluster. The Ruby pcsd daemon creates /var/run/pcsd-ruby.socket without a restrictive umask, allowing unprivileged processes to retrieve a hacluster authentication token. Local access to a cluster node is required; the stolen token authorizes administrative PCS actions across the managed cluster.
Summary
What happened
Privilege escalation in ClusterLabs PCS 0.10.5 through 0.10.14 and 0.11.0 through 0.11.3 allows local users to control a cluster. The Ruby pcsd daemon creates /var/run/pcsd-ruby.socket without a restrictive umask, allowing unprivileged processes to retrieve a hacluster authentication token. Local access to a cluster node is required; the stolen token authorizes administrative PCS actions across the managed cluster.
The record
- CVE
- CVE-2022-2735
- Published
- Sep 6, 2022
- Updated
- Aug 3, 2024
- Vendor
- ClusterLabs
- Product
- PCS
- Classifications
- CWE-276, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 6, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Affects v0.10.5 and later including all 0.11.x.
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Red Hat Unix-socket token reproducerproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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