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CVE-2026-42789: Erlang OTP, слаба криптография

8.0

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, при специфични условия, без вход и след действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

Improper Following of a Certificate's Chain of Trust vulnerability in Erlang OTP public_key (pubkey_cert module) allows a non-CA certificate to be accepted as an intermediate issuer, enabling certificate chain forgery. In lib/public_key/src/pubkey_cert.erl, pubkey_cert:validate_extensions/7 contains two flaws that together allow a certificate with basicConstraints cA:false and no keyUsage extension to be used as an intermediate issuer in a chain passed to public_key:pkix_path_validation/3: the cA:false clause recurses into the remaining extensions without rejecting the certificate when it is in issuer position, and the keyUsage check only fires when the extension is present, so a certificate lacking keyUsage entirely bypasses the keyCertSign enforcement. Any party holding an end-entity certificate with basicConstraints cA:false and no keyUsage extension, issued by any CA in the victim's trust store, can use that certificate's private key to sign forged leaf certificates for arbitrary identities. public_key:pkix_path_validation/3 accepts the resulting chain, and by extension every TLS or mTLS endpoint built on the OTP ssl application that relies on the default verifier is affected, including server identity verification on the client side and client certificate verification on mTLS servers. This issue affects OTP from OTP 17.0 before OTP 27.3.4.19, OTP 28.5.0.8, and OTP 29.1.2, corresponding to public_key from 0.22 before 1.17.1.7, 1.20.3.6, and 1.21.8. Whether OTP before OTP 17.0, corresponding to public_key before 0.22, is affected is unknown.

Засегнати продукти

  • Erlang OTP: 17.0 преди *
  • Erlang OTP: 0.22 преди *
  • Erlang OTP: 84adefa331c4159d432d22840663c38f155cd4c1 преди *; 0a05b7ca33fb0b3f0a6cb9ae34252bb3a74032b8 преди *; 75ca4c0dc2bbdb286ac3c3fe89cb4b4d2b4dc333 преди *; 82af606b5437c4de1276dbcc8855a47e88231226 преди *
  • Red Hat Red Hat OpenStack Platform 16.2: 0:23.3.4.18-2.el8ost преди *
  • Red Hat Red Hat OpenStack Services on OpenShift 18.0: 0:26.2.5.21-2.el9ost преди *
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat OpenStack Platform 17.1

Вид слабост

История

  • 27 май 2026 Публикувано

Други уязвимости в Erlang OTP

Първоизточници

CVE-2026-42789: Erlang OTP, слаба криптография | freedomonline.bg