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Advisories

CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack

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Severity
critical
Date
Affecting

  • attested-tls-poc <= 731ca82ed533fc7a1092be980887ae2e34261da2

CWE
  • CWE-346 Origin Validation Error
CVSS
9.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Muhammad Usama Sardar
Description
CCC Attestation SIG attested-tls-poc through commit 731ca82 fails to bind early attestation Evidence to the TLS connection, allowing attackers to relay valid Evidence from a genuine attester. Attackers holding an extracted attested TLS private key can forward the relying party's nonce to a genuine attester and replay its Evidence to impersonate the attested workload and intercept data.

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