Local information disclosure via pointer validation
Published Mar 6, 2022 · Updated Aug 4, 2024
Information disclosure in Occlum before 0.26.0 allows local users to access unauthorized information via Intel SGX side channels. In util/mem_util.rs, from_untrusted string handling reads a C string before validating that the pointer and NUL-terminated length are outside the enclave, allowing confused-deputy access. Exploitation requires local execution in an affected SGX enclave; the demonstrated consequence is unauthorized information disclosure through side-channel analysis.
Summary
What happened
Information disclosure in Occlum before 0.26.0 allows local users to access unauthorized information via Intel SGX side channels. In util/mem_util.rs, from_untrusted string handling reads a C string before validating that the pointer and NUL-terminated length are outside the enclave, allowing confused-deputy access. Exploitation requires local execution in an affected SGX enclave; the demonstrated consequence is unauthorized information disclosure through side-channel analysis.
The record
- CVE
- CVE-2021-44421
- Published
- Mar 6, 2022
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-203, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 6, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 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
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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