Local file deletion via username path traversal
Published Sep 21, 2023 · Updated Jun 10, 2026
Relative path traversal in sudo-rs before 0.2.1 allows local users to delete files via a crafted username and sudo -K. SessionRecordFile builds a timestamp path under /var/run/sudo-rs/ts from the unvalidated username, so dot and slash sequences escape that directory before the resolved file is cleared. Exploitation requires login as a specially named account and ordinarily the ability to create that account; the resulting deletion can damage system integrity or interrupt services.
Summary
What happened
Relative path traversal in sudo-rs before 0.2.1 allows local users to delete files via a crafted username and sudo -K. SessionRecordFile builds a timestamp path under /var/run/sudo-rs/ts from the unvalidated username, so dot and slash sequences escape that directory before the resolved file is cleared. Exploitation requires login as a specially named account and ordinarily the ability to create that account; the resulting deletion can damage system integrity or interrupt services.
The record
- CVE
- CVE-2023-42456
- Published
- Sep 21, 2023
- Updated
- Jun 10, 2026
- Vendor
- Trifecta Tech Foundation
- Product
- sudo-rs
- Classifications
- CWE-23, T1485
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 21, 2023CVE publishedPublication date reported by the CVE source.
- Jun 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 0.2.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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