Описание
GnuTLS before 3.1.0 does not verify that the RSA PKCS #1 signature algorithm matches the signature algorithm in the certificate, which allows remote attackers to conduct downgrade attacks via unspecified vectors.
It was found that GnuTLS did not verify whether a hashing algorithm listed in a signature matched the hashing algorithm listed in the certificate. An attacker could create a certificate that used a different hashing algorithm than it claimed, possibly causing GnuTLS to use an insecure, disallowed hashing algorithm during certificate verification.
Отчет
This issue did not affect the version of gnutls package as shipped with Red Hat Enterprise Linux 7. This issue affects the version of gnutls package as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Extended Life Cycle phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | gnutls | Will not fix | ||
| Red Hat Enterprise Linux 7 | gnutls | Not affected | ||
| Red Hat Enterprise Virtualization 3 | mingw-virt-viewer | Affected | ||
| Red Hat Enterprise Linux 6 | gnutls | Fixed | RHSA-2015:1457 | 21.07.2015 |
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Дополнительная информация
Статус:
EPSS
4 Medium
CVSS2
Связанные уязвимости
GnuTLS before 3.1.0 does not verify that the RSA PKCS #1 signature algorithm matches the signature algorithm in the certificate, which allows remote attackers to conduct downgrade attacks via unspecified vectors.
GnuTLS before 3.1.0 does not verify that the RSA PKCS #1 signature algorithm matches the signature algorithm in the certificate, which allows remote attackers to conduct downgrade attacks via unspecified vectors.
GnuTLS before 3.1.0 does not verify that the RSA PKCS #1 signature alg ...
GnuTLS before 3.1.0 does not verify that the RSA PKCS #1 signature algorithm matches the signature algorithm in the certificate, which allows remote attackers to conduct downgrade attacks via unspecified vectors.
ELSA-2015-1457: gnutls security and bug fix update (MODERATE)
EPSS
4 Medium
CVSS2