Privileged root code execution via malicious Tcl input
Published Jun 3, 2020 · Updated Nov 15, 2024
Arbitrary code execution in the Tcl interpreter of Cisco IOS and IOS XE allows local users with privileged EXEC access to run code as root. The interpreter insufficiently validates supplied Tcl data and processes loaded malicious Tcl code, causing memory corruption or root-level execution on the underlying operating system. Exploitation requires local access and privileged EXEC credentials, and successful execution grants control at the operating-system root privilege level.
Summary
What happened
Arbitrary code execution in the Tcl interpreter of Cisco IOS and IOS XE allows local users with privileged EXEC access to run code as root. The interpreter insufficiently validates supplied Tcl data and processes loaded malicious Tcl code, causing memory corruption or root-level execution on the underlying operating system. Exploitation requires local access and privileged EXEC credentials, and successful execution grants control at the operating-system root privilege level.
The record
- CVE
- CVE-2020-3204
- Published
- Jun 3, 2020
- Updated
- Nov 15, 2024
- Vendor
- Cisco
- Product
- Cisco IOS
- Classifications
- CWE-20, T1059
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jun 3, 2020CVE publishedPublication date reported by the CVE source.
- Nov 15, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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- Affected versionversion=n/a
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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