Privileged maintenance access via predictable utility passwords
Published Jul 26, 2022 · Updated Aug 3, 2024
Authentication weakness in Emerson DeltaV controllers and I/O cards allows remote attackers to gain privileged maintenance access. The maintenance-port Telnet challenge-response derives three four-character utility passwords from a timestamp seed with less than 16 bits of entropy using a lookup table and deterministic permutations. An unauthenticated attacker on the adjacent control network can reconstruct the passwords and invoke privileged maintenance operations through TCP port 23.
Summary
What happened
Authentication weakness in Emerson DeltaV controllers and I/O cards allows remote attackers to gain privileged maintenance access. The maintenance-port Telnet challenge-response derives three four-character utility passwords from a timestamp seed with less than 16 bits of entropy using a lookup table and deterministic permutations. An unauthenticated attacker on the adjacent control network can reconstruct the passwords and invoke privileged maintenance operations through TCP port 23.
The record
- CVE
- CVE-2022-29965
- Published
- Jul 26, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-327, T0859
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 26, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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