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CVE-2020-8904

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Date: August 12, 2020

An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later.

Language: C

Severity Score

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

Use of Out-of-range Pointer Offset

CWE-823

Top Fix

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Upgrade Version

Upgrade to version v0.6.0

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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