Описание
When curl is told to use the Certificate Status Request TLS extension, often
referred to as OCSP stapling, to verify that the server certificate is
valid, it fails to detect OCSP problems and instead wrongly consider the
response as fine.
A flaw was found in curl. When curl is configured to use the Certificate Status Request TLS (Transport Layer Security) extension, also known as OCSP (Online Certificate Status Protocol) stapling, it fails to properly detect issues with the OCSP response. This can lead curl to incorrectly validate a server certificate as legitimate, potentially allowing an attacker to bypass certificate validation and establish a connection to a malicious server.
Отчет
This vulnerability affects curl and libcurl certificate validation functionality. Red Hat Product Security has assessed this issue as a Moderate severity vulnerability. The flaw was introduced in curl 8.17.0 as part of functionality that added support for certificate validation using Apple SecTrust together with OpenSSL-based TLS backends. The issue is particularly relevant for users who explicitly enable OCSP validation through --cert-status or CURLOPT_SSL_VERIFYSTATUS, as these options are intended to ensure that certificate revocation status is verified before a connection is accepted.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | curl | Not affected | ||
| Red Hat Enterprise Linux 6 | curl | Not affected | ||
| Red Hat Enterprise Linux 7 | curl | Not affected | ||
| Red Hat Enterprise Linux 8 | curl | Not affected | ||
| Red Hat Enterprise Linux 9 | curl | Not affected | ||
| Red Hat OpenShift Container Platform 4 | rhcos | Not affected | ||
| Red Hat OpenShift Dev Spaces | devspaces/code-rhel9 | Not affected | ||
| Red Hat Trusted Profile Analyzer | rhtpa/rhtpa-trustification-service-rhel9 | Not affected | ||
| Red Hat Hardened Images | curl-main-8.20.0-2.hum1 | Fixed | RHSA-2026:19106 | 19.05.2026 |
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Дополнительная информация
Статус:
5.3 Medium
CVSS3
Связанные уязвимости
When curl is told to use the Certificate Status Request TLS extension, often referred to as *OCSP stapling*, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine.
When curl is told to use the Certificate Status Request TLS extension, often referred to as *OCSP stapling*, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine.
When curl is told to use the Certificate Status Request TLS extension, ...
When curl is told to use the Certificate Status Request TLS extension, often referred to as *OCSP stapling*, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine.
5.3 Medium
CVSS3