CVE-2021-44421

CVSS V2 Low 2.1 CVSS V3 Medium 5.5
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.
Overview
  • CVE ID
  • CVE-2021-44421
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2022-03-10T17:44:15
  • Last Modified Date
  • 2022-03-15T15:22:28
Weakness Enumerations
CWE URL
CWE-203 http://cwe.mitre.org/data/definitions/203.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:occlum_project:occlum:*:*:*:*:*:software_guard_extensions:*:* 1 OR 0.26.0
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:P/I:N/A:N
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 2.1
  • Severity
  • LOW
  • Exploitability Score
  • 3.9
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 5.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
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
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-44421
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44421
History
Created Old Value New Value Data Type Notes
2022-05-10 15:45:53 Added to TrackCVE
2022-12-06 11:46:09 2022-03-10T17:44Z 2022-03-10T17:44:15 CVE Published Date updated
2022-12-06 11:46:09 2022-03-15T15:22:28 CVE Modified Date updated
2022-12-06 11:46:09 Analyzed Vulnerability Status updated