CVE-2021-44421

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 10-03-2022 06:44

Last modified: - 15-03-2022 04:22

Total changes: - 2

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Low

Attack complexity

Local

Attack vector

None

Availability

High

Confidentiality

None

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

5.5

Base score

1.8

3.6

Exploitability score

Impact score

Verification logic

vendor=occlum_project AND product=occlum AND target_software=software_guard_extensions AND versionEndExcluding=0.26.0

Reference

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

Keywords

CVE-2021-44421

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-44421

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures