Privilege escalation in Microsoft Open Enclave SDK

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU54821

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33767

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local administrator to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in Open Enclave SDK, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Open Enclave SDK: 0.1.0 - 0.17.0

CPE2.3

• cpe:2.3:a:microsoft:open_enclave_sdk:*:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:open_enclave_sdk:0.1.0:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:open_enclave_sdk:0.4.0:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33767
http://github.com/openenclave/openenclave/releases/tag/v0.17.1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.