CVE-2026-112377: critical vulnerability in CCC-Attestation attested-tls-poc
CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.2%
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.
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
Affected products
CCC-Attestation · attested-tls-pocReferences
https://datatracker.ietf.org/doc/draft-intra-handshake-fail/https://github.com/CCC-Attestation/attested-tls-pochttps://github.com/CCC-Attestation/attested-tls-poc/pull/58https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formalhttps://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436https://github.com/muhammad-usama-sardar/intra-handshake.failhttps://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack