Out-of-bounds Read in Google Asylo
CVE-2021-22552
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
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (3.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Google Asylo
- Google Llc Asylo — versions unspecified
Weakness classification (CWE)
References
- github.com/google/asylo/commit/90d7619e9dd99bcdb6cd28c7649d741d254d9a1a (Exploit, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22552?
- CVE-2021-22552 is a medium-severity vulnerability in Google Asylo, classified under Buffer Over-read. CVSS score: 5.3/10. Published 2021-08-02.
- How severe is CVE-2021-22552?
- Medium severity. CVSS v3 base score is 5.3 out of 10.