Vulnerability · Published Dec 15, 2020 · Assigned by Google

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

Medium 5.3

In plain English

A medium-severity buffer overflow in Asylo from Google LLC. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.1%top 97.3% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Google LLC	Asylo	0.6.0 – through 0.6.0

Weakness: CWE-120 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

References

https://github.com/google/asylo/commit/a37fb6a0e7daf30134dbbf357c9a518a1026aa02 x_refsource_CONFIRM