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.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 2.1 LOW

5.5^/10

CVSS v3.0 : MEDIUM

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

2.1^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

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

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Configurations

Configuration 1 (hide)

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

Information

Published : 2022-03-10 09:44

Updated : 2022-03-15 08:22

NVD link : CVE-2021-44421

Mitre link : CVE-2021-44421

JSON object : View

CWE

CWE-203

Observable Discrepancy

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Products Affected

occlum_project

occlum

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