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CVE-2020-8904

Arbitrary trusted memory overwrite vulnerability in Asylo

CRITICAL
9.6
CVSS Score
Published: August 12, 2020 at 06:20 PM UTC
Updated: June 17, 2026 at 03:27 AM UTC
1 product affected across 1 vendorAsylo

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Severity
CRITICAL9.6
Exploit prediction
EPSS 0.2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Asylo· Google
95%
v < 0.6.0stable ≤ v < 0.6.0stable
Affected range stops below 0.6.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/google/asylo/commit/e582f36ac49ee11a21d23ad6a30c333092e0a94e

CVSS

9.6CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-823CWE-119

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