GHSA-w3vw-ccc5-qr8v

Описание

Impact

This issue only applies to applications starting authorization sessions using an explicit initial nonce.

When Context::start_auth_session was called with a nonce argument value of Some(...), the nonce pointer passed down through FFI to Esys_StartAuthSession would be a dangling pointer, left over from a defunct instance of TPM2B_NONCE. This could lead to an incorrect value being used as a nonce, though whether that value is controllable is unclear (so should be assumed as possible). The error became apparent due to changes in v1.61.0 of the Rust compiler.

Logs indicating a failure due to this issue (with the 1.61.0 version of the Rust toolchain) look as follows:

Patches

The issue has been patched in versions 6 and 7 of the tss-esapi crate. Please update to 7.1.0 or 6.1.2.

Workarounds

There is no workaround that achieves the same functionality.

References

For more information on the cause of the issue and the fix, see this PR.

For more details about the TPM2_StartAuthSession command see section 11.1 of the TPM spec, part 3, and section 19.6.3 of part 1 of the same spec for more information regarding session nonces.

For more information

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