Privasys Go fork: RA-TLS challenge mode did not bind attestation evidence to the TLS session

Privasys Go is a maintained fork of the Go programming language that adds RA-TLS support to crypto/tls. Prior to privasys-v0.5.1-go1.26.5, challenge-mode RA-TLS certificates bound quote ReportData to the certificate public key and client nonce but not to the active TLS session. An attacker who obtained an enclave TLS private key could relay a genuine quote onto another connection, causing a relying party to accept a handshake terminated by the attacker as an attested enclave connection. This issue is fixed in privasys-v0.5.1-go1.26.5.

Source published

9 Oct 2026 21:11:33 UTC

Source modified

13 Oct 2026 15:53:06 UTC

Observed here

23 Oct 2026 15:48:27 UTC

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CVSS 4.0 · 9.1 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