CVE-2024-29040

This repository hosts source code implementing the Trusted Computing Groups (TCG) TPM2 Software Stack (TSS). The JSON Quote Info returned by Fapi_Quote has to be deserialized by Fapi_VerifyQuote to the TPM Structure TPMS_ATTEST. For the field TPM2_GENERATED magic of this structure any number can be used in the JSON structure. The verifier can receive a state which does not represent the actual, possibly malicious state of the device under test. The malicious device might get access to data it shouldnt, or can use services it shouldnt be able to. This issue has been patched in version 4.1.0.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Potential Mitigations

• Make fields transient to protect them from deserialization.
• An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/586.html

References

• https://github.com/tpm2-software/tpm2-tss/releases/tag/4.1.0
• https://github.com/tpm2-software/tpm2-tss/security/advisories/GHSA-837m-jw3m-h9p6
• https://github.com/tpm2-software/tpm2-tss/releases/tag/4.1.0
• https://github.com/tpm2-software/tpm2-tss/security/advisories/GHSA-837m-jw3m-h9p6