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,

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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, (CVE-2022-1053)

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2658-1 advisory.

    Update to version 6.3.2, including fixes for:

    - CVE-2022-1053: Fixed Tenant and Verifier might not use the same registrar data (bsc#1199253).
    - CVE-2022-31250: Fixed %post scriplet allows for privilege escalation from keylime user to root     (bsc#1200885).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
416309	SCA: security update for keylime (GHSA-jf66-3q76-h5p5)	Tenable Cloud Security	SCA Checks	critical
416309	SCA: security update for keylime (GHSA-jf66-3q76-h5p5)	Tenable Self-Hosted Container Security	SCA Checks	critical
163818	SUSE SLED15: keylime-agent / keylime-config / keylime-firewalld / etc (SUSE-SU-2022:2658-1)	Nessus	SuSE Local Security Checks	critical

Detections

Analytics

CVE-2022-1053

critical

Tenable Plugins

critical

critical

critical