Vulnerability Details : CVE-2020-8904

An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later.
Published 2020-08-12 19:15:15
Updated 2020-08-13 14:42:09
Source Google Inc.
View at NVD,   CVE.org
Vulnerability category: Overflow

Exploit prediction scoring system (EPSS) score for CVE-2020-8904

EPSS FAQ
0.08%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-8904

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.5
 MEDIUM AV:N/AC:L/Au:S/C:N/I:P/A:P
8.0
4.9
 NIST
6.4
 MEDIUM CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H
1.1
4.7
 Google Inc.
9.6
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
3.1
5.8
 NIST

CWE ids for CVE-2020-8904

  • The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
    Assigned by: nvd@nist.gov (Primary)
  • The product performs pointer arithmetic on a valid pointer, but it uses an offset that can point outside of the intended range of valid memory locations for the resulting pointer.
    Assigned by: cve-coordination@google.com (Secondary)

References for CVE-2020-8904

Products affected by CVE-2020-8904

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