Buffer overflow in Google Asylo
CVE-2020-8905
A buffer length validation vulnerability in Asylo versions prior to 0.6.0 allows an attacker to read data they should not have access to. The 'enc_untrusted_recvfrom' function generates a return value which is deserialized by 'MessageReader', and copied into three different 'extents'. The length of the third 'extents' is controlled by the outside world, and not verified on copy, allowing the attacker to force Asylo to copy trusted memory data into an untrusted buffer of significantly small length.. We recommend updating Asylo to version 0.6.0 or later.
Vulnerability class: Buffer Overflow
EPSS: 0.002 (15.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.8 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N.
Affected products
- Google Asylo
- Google Llc Asylo — versions stable
Weakness classification (CWE)
References
- cve-coordination@google.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8905?
- CVE-2020-8905 is a low-severity vulnerability in Google Asylo, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 2.8/10. Published 2020-08-12.
- How severe is CVE-2020-8905?
- Low severity. CVSS v3 base score is 2.8 out of 10.