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CVE-2020-8918

23
FAUCET Score

CVE-2020-8918 describes an improper initialization vulnerability in Google's go-tpm TPM1.2 library versions prior to 0.3.0. This flaw allows an eavesdropping attacker to discover the 'migrationAuth' value for keys created with CreateWrapKey, potentially compromising the key's security. Rated with a CVSS score of 7.1 (HIGH), the vulnerability has a low attack complexity and requires local access, but can lead to high confidentiality and integrity impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.3.0CPE matchmatch criteria
cpe:2.3:a:google:go-tpm:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.3MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.0
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.18%
Probability of exploitation in next 30 days
EPSS Percentile
7.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0018 is in the 31st percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/google/go-tpmFixed in: 0.3.0

Vendor Advisories (1)

goGHSA-5x29-3hr9-6wpwhigh

TPM 1.2 key authorization values vulnerable to TPM transport eavesdropper in go-tpm

Feb 11, 2022

References

github.com / google/go-tpm/security/advisories/GHSA-5x29-3hr9-6wpw
ExploitThird Party Advisory