Описание
A flaw was found in Keycloak. When an authenticated attacker attempts to merge accounts with another existing account during an identity provider (IdP) login, the attacker will subsequently be prompted to "review profile" information. This vulnerability allows the attacker to modify their email address to match that of a victim's account, triggering a verification email sent to the victim's email address. The attacker's email address is not present in the verification email content, making it a potential phishing opportunity. If the victim clicks the verification link, the attacker can gain access to the victim's account.
Отчет
To exploit this vulnerability, IdP must be configured in Keycloak and the attacker would require both a registered Keycloak and identity provider account. Additionally, an attacker would need to know the email or Keycloak username of the victim. Finally, the victim would need to accept the verification link within the 5 minutes that the token is active.
Меры по смягчению последствий
Disable account review in the Identity Provider to prevent users from potentially modifying identity information. Disable the email verification step and use only re-authentication step.
Дополнительная информация
Статус:
EPSS
5.4 Medium
CVSS3
Связанные уязвимости
A flaw was found in Keycloak. When an authenticated attacker attempts to merge accounts with another existing account during an identity provider (IdP) login, the attacker will subsequently be prompted to "review profile" information. This vulnerability allows the attacker to modify their email address to match that of a victim's account, triggering a verification email sent to the victim's email address. The attacker's email address is not present in the verification email content, making it a potential phishing opportunity. If the victim clicks the verification link, the attacker can gain access to the victim's account.
A flaw was found in Keycloak. When an authenticated attacker attempts ...
Keycloak phishing attack via email verification step in first login flow
EPSS
5.4 Medium
CVSS3