CVE-2021-44421

View on CVE.org

Published Mar 6, 2022 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:occlum_project:occlum:*:*:*:*:*:software_guard_extensions:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-31262	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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Local

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.436% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L130
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L51
https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249
https://github.com/occlum/occlum/compare/0.25.0...v0.26.0

History

No history.

Subscriptions

Occlum Project Occlum

Weaknesses

CWE-203

Sources

CVE record Updated: Aug 4, 2024, 4:25 AM

Status: PUBLISHED
Assigner: mitre
Published: Mar 6, 2022, 8:03 PM
Updated: Aug 4, 2024, 4:25 AM
Reserved: Nov 29, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:12 AM

Status: Modified
Published: Mar 10, 2022, 5:44 PM
Modified: Jun 17, 2026, 4:12 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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