Vulnerability in Occlum Project
CVE-2021-44421
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libo… (Exploit, Third Party Advisory)
- github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libo… (Exploit, Third Party Advisory)
- github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249 (Patch, Third Party Advisory)
- github.com/occlum/occlum/compare/0.25.0...v0.26.0 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-44421?
- CVE-2021-44421 is a medium-severity vulnerability in Occlum Project, classified under Observable Discrepancy. CVSS score: 5.5/10. Published 2022-03-10.
- How severe is CVE-2021-44421?
- Medium severity. CVSS v3 base score is 5.5 out of 10.