CVE-2023-3326— FreeBSD 授权问题漏洞

Network authentication attack via pam_krb5

pam_krb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on the system, pam_krb5 has no way to validate the response from the KDC, and essentially trusts the tgt provided over the network as being valid. In a non-default FreeBSD installation that leverages pam_krb5 for authentication and does not have a keytab provisioned, an attacker that is able to control both the password and the KDC responses can return a valid tgt, allowing authentication to occur for any user on the system.

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认证算法的不正确实现

FreeBSD 授权问题漏洞

FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在安全漏洞，该漏洞源于如果系统上未配置密钥表，pam_krb5无法验证来自KDC的响应，攻击者利用该漏洞可以对系统上的任何用户进行身份验证。

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