Arbitrary code execution via crafted tape symbols
Published May 10, 2021 · Updated Aug 3, 2024
Improper input validation in the 1967 Minsky Universal Turing Machine allows local users to execute injected code via crafted tape data. During the fourth simulation phase, A and B symbols where binary digits are expected move the tape head into attacker-controlled data, which is then parsed as a new machine description. Exploitation requires control of the simulated tape and a first executed quintuple that moves left; the demonstration affects only an abstract machine and has no real-world implications.
Summary
What happened
Improper input validation in the 1967 Minsky Universal Turing Machine allows local users to execute injected code via crafted tape data. During the fourth simulation phase, A and B symbols where binary digits are expected move the tape head into attacker-controlled data, which is then parsed as a new machine description. Exploitation requires control of the simulated tape and a first executed quintuple that moves left; the demonstration affects only an abstract machine and has no real-world implications.
The record
- CVE
- CVE-2021-32471
- Published
- May 10, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-20
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 10, 2021CVE 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?
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
- Universal Turing Machine exploit implementationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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