VulnerabilityModified
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.
MEDIUM 5.5EPSS 0.44%
Does this matter?
Lower severity and a low EPSS score (0.44%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.44% probability · 37th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- occlum project/occlum
- Source
- cve@mitre.org
References
- https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L130Exploit, Third Party Advisory
- https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L51Exploit, Third Party Advisory
- https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249Patch, Third Party Advisory
- https://github.com/occlum/occlum/compare/0.25.0...v0.26.0Third Party Advisory
- https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L130Exploit, Third Party Advisory
- https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L51Exploit, Third Party Advisory
- https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249Patch, Third Party Advisory
- https://github.com/occlum/occlum/compare/0.25.0...v0.26.0Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.