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CVE-2026-112377— CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack

Quick assessment

Affected
CCC-Attestation attested-tls-poc
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CCC 的 Attestation SIG 在通过 commit 731ca82 的 attested-tls-poc 项目中，未能将早期 attestation 证据（Evidence）与 TLS 连接进行绑定，导致攻击者能够将来自真实 attester 的有效证据进行重放。持有已提取的 attested TLS 私钥的攻击者，可以将依赖方（relying party）提供的随机数（nonce）转发给真实的 attester，随后重放其返回的证据，从而冒充已验证的工作负载并拦截数据。

CVSS 7.4 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
CCC-Attestation attested-tls-poc ≤ 731ca82ed533fc7a1092be980887ae2e34261da2 affected
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I. Basic Information for CVE-2026-112377

Vulnerability Information
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Vulnerability Title
CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
CCC-Attestation attested-tls-poc 0 ~ 731ca82ed533fc7a1092be980887ae2e34261da2 -

II. Public POCs for CVE-2026-112377

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-112377

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Patches & Fixes for CVE-2026-112377 (1)

Vendor Advisories for CVE-2026-112377 (1)

Proof of Concept for CVE-2026-112377 (2)

IV. Related Vulnerabilities

Same weakness: CWE-346

V. Comments for CVE-2026-112377

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