Vulnerability Details : CVE-2020-8937
An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to enc_untrusted_create_wait_queue that uses a pointer queue that relies on UntrustedLocalMemcpy, which fails to validate where the pointer is located. This allows an attacker to write memory values from within the enclave. We recommend upgrading past commit a37fb6a0e7daf30134dbbf357c9a518a1026aa02
Vulnerability category: OverflowMemory Corruption
Products affected by CVE-2020-8937
- cpe:2.3:a:google:asylo:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-8937
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-8937
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:P/A:N |
3.9
|
2.9
|
NIST | |
5.3
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N |
1.0
|
4.2
|
Google Inc. | |
3.3
|
LOW | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
1.8
|
1.4
|
NIST |
CWE ids for CVE-2020-8937
-
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.Assigned by: cve-coordination@google.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-8937
-
https://github.com/google/asylo/commit/a37fb6a0e7daf30134dbbf357c9a518a1026aa02
Check untrusted queue is in outside enclave · google/asylo@a37fb6a · GitHubPatch;Third Party Advisory
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