CVE Vulnerability

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.

2.1 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

5.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249 Patch Third Party Advisory
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L130 Exploit Third Party Advisory
https://github.com/occlum/occlum/compare/0.25.0...v0.26.0 Third Party Advisory
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L51 Exploit Third Party Advisory
Configurations

Configuration 1

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

Published : 2022-03-10 05:44

Updated : 2022-03-15 03:22

NVD link : CVE-2021-44421

Mitre link : CVE-2021-44421

Products Affected
No products.
CWE
CWE-203