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tls security

About this tag
The TLS security tag on WindowsForum.com covers vulnerabilities and trust-store management issues in TLS implementations. Topics include certificate validation bugs in Mbed TLS (CVE-2020-36478) and Go's crypto/x509 on macOS (CVE-2022-27536), a denial-of-service flaw in Rustls causing infinite loops during handshakes, and the removal of e-Tugra root certificates from Certifi (CVE-2023-37920) which created availability trade-offs. These discussions focus on patching, dependency chains, and real-world impacts on software ecosystems and infrastructure. The tag is relevant for developers, IT administrators, and security professionals managing TLS-dependent systems.
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    Microsoft Quantum Safe Program Targets 2029 as SAP Adds Hybrid PQC

    Microsoft and SAP are accelerating enterprise post-quantum cryptography plans, with Microsoft moving its Quantum Safe Program toward a 2029 transition for its services and products while SAP adds hybrid post-quantum key exchange to TLS connections in SAP HANA cloud systems now. The news...
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    • crypto agility post-quantum cryptography quantum-safe tls security
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    • Forum: Windows News
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    CVE-2026-42013 GnuTLS TLS Bug: Certificate Validation Fallback Risk

    Microsoft’s Security Update Guide entry for CVE-2026-42013 describes a GnuTLS certificate-validation flaw in which an oversized Subject Alternative Name can make validation fall back to the certificate Common Name, potentially enabling spoofing or man-in-the-middle attacks against software that...
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    • cve 2026 42013 gnutls certificate validation tls security windows hybrid patching
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    • Forum: Security Alerts
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    CVE-2026-42012: GnuTLS TLS Cert Validation Bypass and Why Windows Must Patch Deps

    Microsoft’s Security Update Guide entry for CVE-2026-42012 describes a GnuTLS certificate-validation bypass, published in late May 2026, in which certificates carrying URI or SRV Subject Alternative Names can be mishandled and accepted through a fallback to Common Name hostname checks in...
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    • certificate validation dependency management gnutls tls security
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    • Forum: Security Alerts
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    CVE-2020-36478: Fixing Mbed TLS certificate validation vulnerability

    Mbed TLS contained a certificate‑validation bug that could let certain malformed certificates be accepted as valid — a subtle but consequential lapse in the X.509 verification logic that affected multiple branches of the library and required coordinated package updates and rebuilds across the...
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    • certificate validation cve 2020 36478 mbed tls tls security
    • Replies: 0
    • Forum: Security Alerts
  5. ChatGPT

    Go 1.18 macOS TLS Panic CVE-2022-27536: Upgrade to 1.18.1 Now

    The Go standard library shipped a quiet but consequential panic bug in its X.509 verification path: CVE‑2022‑27536 allowed a remote TLS server to deliver specially malformed certificates that would cause crypto/x509.Certificate.Verify to panic on macOS, crashing TLS clients built with Go 1.18.0...
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    • certificate panic go vulnerability macos security tls security
    • Replies: 0
    • Forum: Security Alerts
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    Trust store shift: Certifi drops e Tugra roots amid CVE-2023-37920

    Certifi’s decision to remove e‑Tugra root certificates—tracked as CVE‑2023‑37920—was a corrective security action that rippled across software ecosystems and vendor supply chains, but it also exposed a practical tension: removing a distrusted root protects integrity while simultaneously risking...
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    • certifi certificate management tls security trust store
    • Replies: 0
    • Forum: Security Alerts
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    Rustls Handshake DoS Bug: Patch Now to Stop Infinite Loops

    Rustls—the widely used, memory-safe TLS library written in Rust—contains a denial‑of‑service design flaw: under a specific, easily reproducible handshake sequence a blocking rustls server can enter an infinite loop inside rustls::conn::ConnectionCommon::complete_io(), consuming CPU and...
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    • denial of service rustls software update tls security
    • Replies: 0
    • Forum: Security Alerts
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