Vulnerability · Published Aug 2, 2021 · Assigned by Google

CVE-2021-22552Memory overread secure enclave in Asylo 0.6.2

Medium 5.3

In plain English

A medium-severity security flaw 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 0.2% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 95.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

An untrusted memory read vulnerability in Asylo versions up to 0.6.1 allows an untrusted attacker to pass a syscall number in MessageReader that is then used by sysno() and can bypass validation. This can allow the attacker to read memory from within the secure enclave. We recommend updating to Asylo 0.6.3 or past https://github.com/google/asylo/commit/90d7619e9dd99bcdb6cd28c7649d741d254d9a1a

Affected products (as reported)

Vendor	Product	Versions
Google LLC	Asylo	unspecified – through 0.6.2

Weakness: CWE-126 · 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/90d7619e9dd99bcdb6cd28c7649d741d254d9a1a x_refsource_MISC