Kurz gesagt
- CVE-2022-1053 ist eine Schwachstelle (KRITISCH (CVSS 9.1)) in keylime, keylime (keylime).
- Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 1.5%, höher als bei 73.9% aller Schwachstellen.
- Abhilfe: auf 6.4.0 oder neuer aktualisieren.
| Package | Affected versions | Patched versions |
|---|
| keylime PyPI | < 6.4.0
| 6.4.0
|
| keylime | < 6.4.0
| 6.4.0
|
Description
Keylime does not enforce that the agent registrar data is the same when the tenant uses it for validation of the EK and identity quote and the verifier for validating the integrity quote. This allows an attacker to use one AK, EK pair from a real TPM to pass EK validation and give the verifier an AK of a software TPM. A successful attack breaks the entire chain of trust because a not validated AK is used by the verifier. This issue is worse if the validation happens first and then the agent gets added to the verifier because the timing is easier and the verifier does not validate the regcount entry being equal to 1. At this time, there are no known workaround.
NVD description
Keylime does not enforce that the agent registrar data is the same when the tenant uses it for validation of the EK and identity quote and the verifier for validating the integrity quote. This allows an attacker to use one AK, EK pair from a real TPM to pass EK validation and give the verifier an AK of a software TPM. A successful attack breaks the entire chain of trust because a not validated AK is used by the verifier. This issue is worse if the validation happens first and then the agent gets added to the verifier because the timing is easier and the verifier does not validate the regcount entry being equal to 1,
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