Medium severity · published Dec 15, 2020
CVE-2020-8936
An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to UntrustedCall
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Asylo · Google
through 0.6.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8936
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8936
Patch
https://github.com/google/asylo/commit/83036fd841d33baa7e039f842d131aa7881fdcc2
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