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AlienVault OTX Vulnerabilities

AlienVault OTX Malware

A flaw was found in the keylime attestation verifier, which fails to flag a device's submitted TPM quote as faulty when the quote's signature does not validate for some reason. Instead, it will only emit an error in the log without flagging the device as untrusted.

CVE-2023-3674 identifies a vulnerability in the keylime attestation verifier used in Red Hat Enterprise Linux 9. Keylime is a framework that performs remote attestation by verifying TPM (Trusted Platform Module) quotes from devices to ensure their integrity and trustworthiness. The vulnerability arises because the verifier does not properly flag a TPM quote as faulty when its signature validation fails. Instead of marking the device as untrusted, the verifier only logs an error message, effectively allowing devices with invalid or tampered TPM quotes to be treated as trusted. This undermines the core security principle of attestation, which is to ensure that only devices with verified integrity are trusted. The flaw requires local privileges to exploit since the CVSS vector indicates attack vector as local (AV:L) and privileges required as high (PR:H). There is no user interaction needed (UI:N), and the scope is unchanged (S:U). The impact on confidentiality is none (C:N), but integrity is slightly impacted (I:L) because untrusted devices might be accepted, while availability is unaffected (A:N). No known exploits are reported in the wild, and no patches have been linked yet, though the vulnerability is publicly disclosed. This issue is particularly relevant for environments relying on TPM-based attestation for device trust decisions, such as secure cloud deployments, critical infrastructure, and enterprise environments using Red Hat Enterprise Linux 9.

Detailed information about CVE-2023-3674: Mutable Attestation or Measurement Reporting Data in Red Hat Red Hat Enterprise Linux 9 affecting Red Hat Red Hat Ente

CVE-2023-3674: Mutable Attestation or Measurement Reporting Data in Red Hat Red Hat Enterprise Linux 9 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-3674: Mutable Attestation or Measurement Reporting Data in Red Hat Red Hat Enterprise Linux 9

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