Vulnerability · Published Dec 15, 2020 · Assigned by Google

CVE-2020-8940Unchecked buffer overrun in enc_untrusted_recvmsg

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 97.0% 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_recvmsg using an attacker controlled result parameter. 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 or past commit fa6485c5d16a7355eab047d4a44345a73bc9131e

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/fa6485c5d16a7355eab047d4a44345a73bc9131e x_refsource_CONFIRM