CVE-2020-8936 json
Arbitrary enclave memory overwrite vulnerability in ECall ecall_restore
published 2020-12-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29767
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 2%
- public exploits
- 0
- none known
Summary
An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to UntrustedCall. UntrustedCall failed to validate the buffer range within sgx_params and allowed the host to return a pointer that was an address within the enclave memory. This allowed an attacker to read memory values from within the enclave.
Patch / fix
Exploit prediction
0.14% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N |
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- Google LLC Asylo
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
github.com
/google/asylo/commit/83036fd841d33baa7e039f842d131aa7881fdcc2
patch, third-party-advisory
Sources
- CVE List CVE-2020-8936
- NVD CVE-2020-8936
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