Vulnerability identifier: #VU45854

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8904

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
asylo
/

Vendor: Google

Description

The vulnerability allows a remote authenticated user to #BASIC_IMPACT#.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

asylo: 0.2.0 - 0.5.3

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External links
http://github.com/google/asylo/commit/e582f36ac49ee11a21d23ad6a30c333092e0a94e

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.