Improper Initialization Affecting github.com/google/go-tpm/tpm package, versions <0.2.0>0.2.0 <0.3.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMGOOGLEGOTPMTPM-598254
- published12 Aug 2020
- disclosed12 Aug 2020
- creditChris Fenner
Introduced: 12 Aug 2020
CVE-2020-8918 (opens in a new tab)How to fix?
Upgrade github.com/google/go-tpm/tpm to version 0.2.0, 0.3.0 or higher.
Overview
github.com/google/go-tpm/tpm is a Go library that communicates directly with a TPM device on Linux or Windows machines.
Affected versions of this package are vulnerable to Improper Initialization. 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.