Vulnerability · Published Dec 15, 2020 · Assigned by Google

CVE-2020-8943Unchecked buffer overrun in enc_untrusted_recvfrom

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 97.2% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

An arbitrary memory read vulnerability in Asylo versions up to 0.6.0 allows an untrusted attacker to make a call to enc_untrusted_recvfrom whose return size was not validated against the requested size. The parameter size is unchecked allowing the attacker to read memory locations outside of the intended buffer size including memory addresses within the secure enclave. We recommend upgrading past commit 6e158d558abd3c29a0208e30c97c9a8c5bd4230f

Affected products (as reported)

Vendor	Product	Versions
Google LLC	Asylo	unspecified – 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/6e158d558abd3c29a0208e30c97c9a8c5bd4230f x_refsource_CONFIRM