CVE-2020-8936 - CVE House

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Status published Medium CVE-2020-8936

Arbitrary enclave memory overwrite vulnerability in ECall ecall_restore

5.3 CVSS

Vulnerability Description

An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to UntrustedCall. UntrustedCall failed to validate the buffer range within sgx_params and allowed the host to return a pointer that was an address within the enclave memory. This allowed an attacker to read memory values from within the enclave.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Qinkun Bao (Baidu Security)
Zhaofeng Chen (Baidu Security)
Mingshen Sun (Baidu Security)
Kang Li (Baidu Security)

References

https://github.com/google/asylo/commit/83036fd841d33baa7e039f842d131aa7881fdcc2

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Affected Vendor

Google LLC

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Affected Software

Asylo

Vulnerable Versions:

0.6.0

Timeline

Official Publish: December 15th, 2020

Last Modified: August 4th, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1213 Data from Information Repositories

T1003 OS Credential Dumping

Credential Access

T1552 Unsecured Credentials

Credential Access