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CVE-2022-23551— AAD Pod Identity obtaining token with backslash

Quick assessment

Affected
Azure aad-pod-identity
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.

Microsoft AAD Pod Identity是美国微软（Microsoft）公司的 将 Azure Active Directory 身份分配给 Kubernetes 应用程序。 AAD Pod Identity 1.8.13之前版本存在安全漏洞，该漏洞源于NMI组件根据正则表达式拦截和验证令牌请求，在请求中使用反斜杠发出的令牌请求将绕过NMI验证并发送到 IMDS，从而允许集群中的pod访问它不应该访问的身份。

CVSS 5.3 · Medium EPSS 0.74% · P53

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2022-23551

Vulnerability Information
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Vulnerability Title
AAD Pod Identity obtaining token with backslash
Source: CVE Program / CVE List V5
Vulnerability Description
aad-pod-identity assigns Azure Active Directory identities to Kubernetes applications and has now been deprecated as of 24 October 2022. The NMI component in AAD Pod Identity intercepts and validates token requests based on regex. In this case, a token request made with backslash in the request (example: `/metadata/identity\oauth2\token/`) would bypass the NMI validation and be sent to IMDS allowing a pod in the cluster to access identities that it shouldn't have access to. This issue has been fixed and has been included in AAD Pod Identity release version 1.8.13. If using the AKS pod-managed identities add-on, no action is required. The clusters should now be running the version 1.8.13 release.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1259
Source: CVE Program / CVE List V5
Vulnerability Title
AAD Pod Identity 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft AAD Pod Identity是美国微软（Microsoft）公司的 将 Azure Active Directory 身份分配给 Kubernetes 应用程序。 AAD Pod Identity 1.8.13之前版本存在安全漏洞，该漏洞源于NMI组件根据正则表达式拦截和验证令牌请求，在请求中使用反斜杠发出的令牌请求将绕过NMI验证并发送到 IMDS，从而允许集群中的pod访问它不应该访问的身份。
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
Azure aad-pod-identity < 1.8.13 -

II. Public POCs for CVE-2022-23551

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III. Intelligence Information for CVE-2022-23551

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Patches & Fixes for CVE-2022-23551 (1)

Vendor Advisories for CVE-2022-23551 (1)

Other References for CVE-2022-23551 (1)

IV. Related Vulnerabilities

Same vendor: Azure
Same weakness: CWE-1259

V. Comments for CVE-2022-23551

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