CVE-2021-44421

low-risk
Published 2022-03-10

The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.

Do I need to act?

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0.07% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Occlum

Affected Vendors

Occlum Project

References (8)

Exploit https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/s...
Exploit https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/s...
Patch https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249
Third Party Advisory https://github.com/occlum/occlum/compare/0.25.0...v0.26.0
Exploit https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/s...
Exploit https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/s...
Patch https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249
Third Party Advisory https://github.com/occlum/occlum/compare/0.25.0...v0.26.0
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal