Invalid counter result via out-of-range RTL read
Published Jun 29, 2022 · Updated Aug 3, 2024
Out-of-bounds read in CVA6 commit 909d85a allows attackers to obtain an unknown value by reading the MHPMCOUNTER30 register. The CSR register-file logic indexes perf_counter_d with CSR_MHPM_COUNTER_30 even though that index lies beyond the array range defined in perf_counters.sv. Exploitation requires executing the affected counter read in hardware built from that commit, and the demonstrated consequence is an indeterminate counter result rather than a proven memory disclosure.
Summary
What happened
Out-of-bounds read in CVA6 commit 909d85a allows attackers to obtain an unknown value by reading the MHPMCOUNTER30 register. The CSR register-file logic indexes perf_counter_d with CSR_MHPM_COUNTER_30 even though that index lies beyond the array range defined in perf_counters.sv. Exploitation requires executing the affected counter read in hardware built from that commit, and the demonstrated consequence is an indeterminate counter result rather than a proven memory disclosure.
The record
- CVE
- CVE-2022-33021
- Published
- Jun 29, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 29, 2022CVE 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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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- MHPMCOUNTER30 triggering inputproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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