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Advisories

Kyverno before 1.19.2 Policy Bypass via admissionpolicygenerator PolicyException Handling

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Severity
high
Date
Affecting

  • kyverno >= 0, < 1.19.2

CWE
  • CWE-863 Incorrect Authorization
CVSS
8.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Credit
1diot9
Description
Kyverno before 1.19.2 contains a policy bypass vulnerability in the admissionpolicygenerator controller, which folds PolicyExceptions into generated ValidatingAdmissionPolicies while ignoring the --enablePolicyException, --exceptionNamespace, and policy kind gates. Users with namespaced create rights on PolicyExceptions can inject negated matchConditions into the generated policies to admit violating resources, bypassing cluster-wide enforcement.

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