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codeql/csharp/ql/src/Security Features/CookieWithOverlyBroadDomain.ql
2021-06-15 13:25:17 +01:00

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/**
* @name Cookie security: overly broad domain
* @description Finds cookies with an overly broad domain.
* @kind problem
* @problem.severity warning
* @security-severity 9.3
* @precision high
* @id cs/web/broad-cookie-domain
* @tags security
* external/cwe/cwe-287
*/
import csharp
from Assignment a, PropertyAccess pa
where
a.getLValue() = pa and
pa.getTarget().hasName("Domain") and
pa.getTarget().getDeclaringType().hasQualifiedName("System.Web", "HttpCookie") and
(
a.getRValue().getValue().regexpReplaceAll("[^.]", "").length() < 2 or
a.getRValue().getValue().matches(".%")
)
select a, "Overly broad domain for cookie."