CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, при специфични условия, само при определена конфигурация или състояние на системата, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_ocsp module) allows forged OCSP responses signed with an expired responder certificate to be accepted as valid. OCSP response verification in pubkey_ocsp:verify_response/5 and pubkey_ocsp:is_authorized_responder/3 in lib/public_key/src/pubkey_ocsp.erl does not check the validity period (notBefore/notAfter) of the OCSP responder certificate. An attacker who has obtained the private key of an expired CA-designated OCSP responder certificate can forge OCSP responses that Erlang/OTP accepts as valid. This affects TLS clients using OCSP stapling via the ssl application: a malicious or compromised server can present a revoked TLS certificate together with a forged OCSP response signed by an expired responder key, and the client will accept the revoked certificate as valid. It also affects applications calling public_key:pkix_ocsp_validate/5 directly, where the impact depends on the use case — server-side client certificate validation using this API may allow authentication bypass with a revoked client certificate. This issue affects OTP from OTP 27.0 before OTP 29.0.1, OTP 28.5.0.1 and OTP 27.3.4.12, corresponding to public_key from 1.16 before 1.21.1, 1.20.3.1 and 1.17.1.3.
Засегнати продукти
- Erlang OTP: от 1.16 нататък
- Erlang OTP: от 27.0 нататък; от 2b1a742c651b90f8a7a1fb2ddde73f29915ea376 нататък
Вид слабост
История
- 27 май 2026 Публикувано
Други уязвимости в Erlang OTP
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-42791
- https://nvd.nist.gov/vuln/detail/CVE-2026-42791
- https://github.com/erlang/otp/security/advisories/GHSA-cjxj-wj6x-3fff
- https://cna.erlef.org/cves/CVE-2026-42791.html
- https://osv.dev/vulnerability/EEF-CVE-2026-42791
- https://www.erlang.org/doc/system/versions.html#order-of-versions
- https://github.com/erlang/otp/commit/7995f1fdaee3da569bb810358ce0f546471d169b
- https://github.com/erlang/otp/commit/b3870e02405c709a872b01ba6086065620cdfe76