QID 375715

Date Published: 2021-07-14

QID 375715: Open Enclave Software Development Kit (SDK) Elevation of Privilege Vulnerability July 2021

Enclaves have a vulnerability that provides a brief window for a local attacker to hijack the control flow of execution by controlling the input parameters. A malicious host can create an exception immediately after EENTER which causes control to be transferred to the host before the enclave stack(RSP register) has been set up. The host can then transfer control back to the enclave and cause it to execute with a stack that resides in host memory thereby enabling ROP exploits.

Affected Software:
Open Enclave SDK version prior to 0.17.1

QID Detection Logic:
Checks for open-enclave package version less than 0.17.1

Successful exploitation allows elecation of privilege.

CVSS V3 rated as High - 6.7 severity.

CVSS V2 rated as Medium - 4.6 severity.

Solution

Customers are advised to refer to v0.17.1 or later for more details.

Vendor References

CVE-2021-33767 - msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33767

CVEs related to QID 375715

CVE-2021-33767 |

Software Advisories

Advisory ID	Software	Component	Link
v0.17.1			github.com/openenclave/openenclave/security/advisories/GHSA-mj87-466f-jq42

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