Уязвимость DoS атаки через некорректную обработку поля издателя в X509-сертификатах в OpenSSL
Описание
Функция X509_issuer_and_serial_hash() из публичного API OpenSSL предназначена для создания уникального хеш-значения на основе данных о издателе и серийном номере, содержащихся в X509-сертификате. Однако, она некорректно обрабатывает ошибки, которые могут возникнуть при разборе поля издателя (что может произойти, если поле издателя было сформировано вредоносным образом). Это может привести к разыменованию NULL-указателя и аварийному завершению работы программы, что способно вызвать DoS атаку. Функция X509_issuer_and_serial_hash() не вызывается напрямую самим OpenSSL, поэтому приложения уязвимы только в том случае, если они используют эту функцию напрямую и применяют её к сертификатам из недостоверных источников.
Затронутые версии ПО
- OpenSSL версии 1.1.1i и ниже
- OpenSSL версии 1.0.2x и ниже (OpenSSL 1.0.2 больше не поддерживается и не получает публичных обновлений)
Тип уязвимости
DoS атака (Denial of Service)
Ссылки
- Mailing ListThird Party Advisory
- Mailing ListThird Party Advisory
- Mailing ListThird Party Advisory
- PatchThird Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Vendor Advisory
- PatchThird Party Advisory
- PatchThird Party Advisory
- PatchThird Party Advisory
- PatchThird Party Advisory
Уязвимые конфигурации
Одно из
Одно из
Одно из
Одно из
Одно из
Одно из
EPSS
5.9 Medium
CVSS3
4.3 Medium
CVSS2
Дефекты
Связанные уязвимости
The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL...
The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL...
The OpenSSL public API function X509_issuer_and_serial_hash() attempts ...
Уязвимость функции X509_issuer_and_serial_hash() инструментария для протоколов TLS и SSL OpenSSL, связанная с целочисленным переполнением, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
5.9 Medium
CVSS3
4.3 Medium
CVSS2