{"cve":"CVE-2020-8918","nvd":{"published":"2020-08-11T19:15:17.547","modified":"2026-06-17T03:27:10.777","status":"Modified","description":"An improperly initialized 'migrationAuth' value in Google's go-tpm TPM1.2 library versions prior to 0.3.0 can lead an eavesdropping attacker to discover the auth value for a key created with CreateWrapKey. An attacker listening in on the channel can collect both 'encUsageAuth' and 'encMigrationAuth', and then can calculate 'usageAuth ^ encMigrationAuth' as the 'migrationAuth' can be guessed for all keys created with CreateWrapKey. TPM2.0 is not impacted by this. We recommend updating your library to 0.3.0 or later, or, if you cannot update, to call CreateWrapKey with a random 20-byte value for 'migrationAuth'.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":7.1},"cwes":["CWE-665"],"references":["https://github.com/google/go-tpm/security/advisories/GHSA-5x29-3hr9-6wpw","https://github.com/google/go-tpm/security/advisories/GHSA-5x29-3hr9-6wpw"],"products":["google:go-tpm"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-8918","score":0.0018,"percentile":0.07548,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-5x29-3hr9-6wpw","url":"https://osv.dev/vulnerability/GHSA-5x29-3hr9-6wpw","summary":"TPM 1.2 key authorization values vulnerable to TPM transport eavesdropper in go-tpm","modified":"2026-07-08T06:29:22.441178764Z","packages":[{"ecosystem":"Go","name":"github.com/google/go-tpm","purl":"pkg:golang/github.com/google/go-tpm","ranges":["<0.3.0"],"fixed":["0.3.0"]}]},{"id":"GO-2021-0095","url":"https://osv.dev/vulnerability/GO-2021-0095","summary":"Sensitive information exposure in github.com/google/go-tpm","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/google/go-tpm","purl":"pkg:golang/github.com/google/go-tpm","ranges":["<0.3.0"],"fixed":["0.3.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}