CVE-2020-8918

Source

https://nvd.nist.gov/vuln/detail/CVE-2020-8918

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8918.json

Aliases

• GHSA-5x29-3hr9-6wpw
• GO-2021-0095

Published

2020-08-11T19:15:17Z

Modified

2023-11-29T08:39:13.008091Z

Details

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'.

References

• https://github.com/google/go-tpm/security/advisories/GHSA-5x29-3hr9-6wpw