Описание
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
Отчет
This vulnerability is rated as Moderate severity because exploitation requires an active man-in-the-middle position or tricking a client into connecting to a rogue endpoint, along with obtaining a validly signed certificate containing specialized SAN fields. While GnuTLS is widely deployed across Red Hat products as a core cryptographic library, the impact is limited to hostname verification spoofing under specific certificate configurations. The issue does not permit remote code execution or direct compromise of the underlying system.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat OpenShift Container Platform 4 | openshift4/ose-hypershift-rhel9 | Not affected | ||
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-8 | Fix deferred | ||
| Red Hat OpenShift Container Platform 5 | openshift/ose-rhel-coreos-9 | Affected | ||
| Red Hat Enterprise Linux 10 | gnutls | Fixed | RHSA-2026:20613 | 26.05.2026 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | gnutls | Fixed | RHSA-2026:26409 | 16.06.2026 |
| Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | gnutls | Fixed | RHSA-2026:94442 | 03.11.2026 |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | gnutls | Fixed | RHSA-2026:43575 | 22.07.2026 |
| Red Hat Enterprise Linux 8 | gnutls | Fixed | RHSA-2026:20611 | 26.05.2026 |
| Red Hat Enterprise Linux 8 | gnutls | Fixed | RHSA-2026:20611 | 26.05.2026 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | gnutls | Fixed | RHSA-2026:33125 | 29.06.2026 |
Показывать по
Дополнительная информация
Статус:
EPSS
7.1 High
CVSS3
Связанные уязвимости
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
Gnutls: gnutls: certificate validation bypass due to improper handling of uri and srv sans
A flaw was found in gnutls. A remote attacker could exploit this vulne ...
EPSS
7.1 High
CVSS3