CVE-2020-8937 - Arbitrary enclave memory location write from untrusted environment

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MEDIUM

Arbitrary enclave memory location write from untrusted environment

Published Dec 15, 2020

5.3

MEDIUM

CVSS 3.1

EPSS 0.13%

Description

An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to enc_untrusted_create_wait_queue that uses a pointer queue that relies on UntrustedLocalMemcpy, which fails to validate where the pointer is located. This allows an attacker to write memory values from within the enclave. We recommend upgrading past commit a37fb6a0e7daf30134dbbf357c9a518a1026aa02

Affected products

Vendor Google LLC Product Asylo Default
n/a
- Version
  0.6.0
  Status
  affected
  Constraints
  <=0.6.0

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Google LLC

Asylo

n/a

Version	Status	Constraints
0.6.0	affected	<=0.6.0

Remediation

Vendor solution

Upgrade past commit a37fb6a0e7daf30134dbbf357c9a518a1026aa02

Weaknesses (2)

CWE-120

Classic Buffer Overflow

CWE-787

Out-of-bounds Write

References (2)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-29768
Advisory
https://github.com/google/asylo/commit/a37fb6a0e7daf30134dbbf357c9a518a1026aa02
x_refsource_CONFIRMPatchThird Party Advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-29768		Advisory
https://github.com/google/asylo/commit/a37fb6a0e7daf30134dbbf357c9a518a1026aa02		x_refsource_CONFIRMPatchThird Party Advisory