Bug 2155904 (CVE-2022-23551)

Summary:	CVE-2022-23551 aad-pod-identity: authentication bypass via backslash
Product:	[Other] Security Response	Reporter:	Anten Skrabec <askrabec>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, jburrell, rogbas, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	aad-pod-identity 1.8.13	Doc Type:	---
Doc Text:	A flaw was found in aad-pod-identity. This issue could allow an attacker to obtain a token when a request is made that includes a backslash, bypassing proper validation and completing the request.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2155833

Description Anten Skrabec 2022-12-22 20:08:01 UTC

aad-pod-identity assigns Azure Active Directory identities to Kubernetes applications. 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.