Vulnerability Details : 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 category: Overflow
Products affected by CVE-2020-8905
- cpe:2.3:a:google:asylo:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-8905
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-8905
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:N/A:N |
8.0
|
2.9
|
NIST | |
|
2.8
|
LOW | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N |
1.1
|
1.4
|
Google Inc. | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2020-8905
-
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)
- nvd@nist.gov (Primary)
References for CVE-2020-8905
-
https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93
Fix vulnerability in enc_untrusted_recvfrom · google/asylo@299f804 · GitHubPatch;Third Party Advisory
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