Information disclosure in Azure Active Directory Pod Identity for Kubernets - CVE-2021-1677
Published: January 12, 2021 / Updated: January 12, 2021
Vulnerability identifier: #VU49490
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-1677
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Azure Active Directory Pod Identity for Kubernets
Azure Active Directory Pod Identity for Kubernets
Detailed vulnerability description
The vulnerability allows a local user to gain access to potentially sensitive information.
The AAD pod identity enables users to assign identities to pods in Kubernetes clusters and fetch them from the pods using a regular IMDS (Azure Instance Metadata Service) request. When an identity is assigned to a pod, the pod can access to the IMDS endpoint and get a token of that identity. An attacker who successfully exploited this vulnerability can laterally steal the identities that are associated with different pods.
How to mitigate CVE-2021-1677
Install updates from vendor's website.