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Advisories

Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath Query String

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Severity
high
Date
Affecting

  • kyverno >= 1.19.1, < 1.19.2

CWE
  • CWE-269 Improper Privilege Management
CVSS
8.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Credit
aradcohAkamai
Description
Kyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in APICall Fetch() in pkg/engine/apicall/apiCall.go because path.Clean treats '?' as a path character, letting the namespace regex match segments inside the query string. Users who can create namespaced policies can supply a URLPath like /api/v1/nodes?x=/namespaces/default/ that passes validation while client-go requests the cluster-scoped endpoint, reading resources outside their namespace.

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