rspec/rules/S6317/javascript/rule.adoc

== Why is this an issue?

include::../description.adoc[]

=== Noncompliant code example

The following policy allows an attacker to update the code of any Lambda function. An attacker can achieve privilege escalation by altering the code of a Lambda that executes with high privileges.

[source,javascript]
----
import {aws_iam as iam} from 'aws-cdk-lib'

new iam.PolicyDocument({
    statements: [new iam.PolicyStatement({
        effect: iam.Effect.ALLOW,
        actions: ["lambda:UpdateFunctionCode"],
        resources: ["*"], // Noncompliant
    })],
})
----

=== Compliant solution

Narrow the policy such that only updates to the code of certain Lambda functions are allowed.

[source,javascript]
----
import {aws_iam as iam} from 'aws-cdk-lib'

new iam.PolicyDocument({
    statements: [new iam.PolicyStatement({
        effect: iam.Effect.ALLOW,
        actions: ["lambda:UpdateFunctionCode"],
        resources: ["arn:aws:lambda:us-east-2:123456789012:function:my-function:1"], // Noncompliant
    })],
})
----

include::../see.adoc[]

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::../message.adoc[]

include::../highlighting.adoc[]

endif::env-github,rspecator-view[]