Описание
A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This may lead to unauthorized message tampering.
Отчет
This issue is classified as a moderate severity vulnerability because it affects the handling of PKINIT requests during ASN.1 decoding in krb5. Exploitation requires specific and uncommon configurations, including a Kerberos environment with PKINIT enabled. Additionally, successful exploitation depends on triggering specific memory allocation failures or parser behaviors, contributing to a high attack complexity.The attack requires that PKINIT is actively configured and in use, and cannot be exploited remotely without this setup in place, making the practical risk limited in standard environments.
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 Ansible Automation Platform 2 | aap-cloud-metrics-collector-container | Fix deferred | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-24/ee-minimal-rhel9 | Fix deferred | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-24/ee-supported-rhel9 | Fix deferred | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-24/platform-resource-runner-rhel8 | Fix deferred | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-25/ansible-builder-rhel8 | Fix deferred | ||
| Red Hat Enterprise Linux 6 | krb5 | Out of support scope | ||
| Red Hat Enterprise Linux 7 | krb5 | Out of support scope | ||
| Red Hat OpenShift Container Platform 4 | rhcos | Fix deferred | ||
| Red Hat Enterprise Linux 10 | krb5 | Fixed | RHSA-2025:9418 | 24.06.2025 |
| Red Hat Enterprise Linux 8 | krb5 | Fixed | RHSA-2025:8411 | 03.06.2025 |
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Дополнительная информация
Статус:
EPSS
5.9 Medium
CVSS3
Связанные уязвимости
A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This may lead to unauthorized message tampering.
A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This may lead to unauthorized message tampering.
A vulnerability in the MIT Kerberos implementation allows GSSAPI-prote ...
A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This may lead to unauthorized message tampering.
EPSS
5.9 Medium
CVSS3