CVE-2020-8935

CVSS V2 Medium 4.6 CVSS V3 High 7.8

Description

An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allow an attacker to make an Ecall_restore function call to reallocate untrusted code and overwrite sections of the Enclave memory address. We recommend updating your library.

Overview

CVE ID
CVE-2020-8935

Assigner
cve-coordination@google.com

Vulnerability Status
Analyzed

Published Version
2020-12-15T15:15:12

Last Modified Date
2021-07-21T11:39:23

Weakness Enumerations

CWE	URL
CWE-119	http://cwe.mitre.org/data/definitions/119.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:google:asylo::::::::	1	OR		0.6.0

CVSS Version 2

Version
2.0

Vector String
AV:L/AC:L/Au:N/C:P/I:P/A:P

Access Vector
LOCAL

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
4.6

Severity
MEDIUM

Exploitability Score
3.9

Impact Score
6.4

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
7.8

Base Severity
HIGH

Exploitability Score
1.8

Impact Score
5.9

References

Reference URL	Reference Tags
https://github.com/google/asylo/commit/ed0926bff0e423cd122a18b3d2fc772817f66825	Patch Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2020-8935
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8935

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:05:57				Added to TrackCVE
2022-12-05 18:15:49	security@google.com	cve-coordination@google.com	CVE Assigner	updated
2022-12-05 18:15:49	2020-12-15T15:15Z	2020-12-15T15:15:12	CVE Published Date	updated
2022-12-05 18:15:49		2021-07-21T11:39:23	CVE Modified Date	updated
2022-12-05 18:15:49		Analyzed	Vulnerability Status	updated