Cross-user code execution via globally editable tasks
Published Apr 15, 2020 · Updated Aug 4, 2024
Improper access control in Z-Cron 5.6 Build 04 allows local users to execute code with another user's privileges via task edits. Z-Cron exposes scheduled tasks globally and permits an unprivileged account to replace the program executed by a task that retains its creator's stored credentials. Exploitation requires local access and an existing privileged task; the next scheduled run executes the substituted program as that privileged user, and a shared path can trigger shells for every signed-in user.
Summary
What happened
Improper access control in Z-Cron 5.6 Build 04 allows local users to execute code with another user's privileges via task edits. Z-Cron exposes scheduled tasks globally and permits an unprivileged account to replace the program executed by a task that retains its creator's stored credentials. Exploitation requires local access and an existing privileged task; the next scheduled run executes the substituted program as that privileged user, and a shared path can trigger shells for every signed-in user.
The record
- CVE
- CVE-2020-11799
- Published
- Apr 15, 2020
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-269, T1053.005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 15, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- Z-Cron lack-of-access-control reproductionfunctional · demonstrated
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Technologies
Your stack
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Your stack
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