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CVE-2023-3326— Network authentication attack via pam_krb5

Quick assessment

Affected
FreeBSD FreeBSD
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 7.4 Difficulty: Moderate EPSS 1.10% · P65
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I. Basic Information for CVE-2023-3326

Vulnerability Information
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Vulnerability Title
Network authentication attack via pam_krb5
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
认证算法的不正确实现
Source: CVE Program / CVE List V5
Vulnerability Title
FreeBSD 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeBSD FreeBSD 13.2-RELEASE ~ 13.2-RELEASE-p1 -

II. Public POCs for CVE-2023-3326

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III. Intelligence Information for CVE-2023-3326

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Vendor Advisories for CVE-2023-3326 (2)

Other References for CVE-2023-3326 (1)

IV. Related Vulnerabilities

Same product: FreeBSD
Same vendor: FreeBSD
Same weakness: CWE-303

V. Comments for CVE-2023-3326

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