AWSMarketplaceImageBuildFullAccess

Last Modified

Sep 18, 2024

September 18, 2024 at 10:06 AM UTC

Version

Total Versions

Created

Mar 4, 2022

Actions

Subscribe to updates

Risk

Medium

The same capabilities in a scoped form, resource policy writes, reads across all data, or full access to a whole service. Read from this policy document alone: trust policies, boundaries and SCPs in your account still decide what actually succeeds. How this is assessed

Medium
Can launch resources that run as a more privileged role
Grants the actions of 1 documented escalation path, but only on named resources or under a condition. Review that scope before trusting it.
- ec2-001iam:PassRole + ec2:RunInstancesscoped
  - iam:PassRole: condition iam:PassedToService, on arn:aws:iam::*:role/*Automation*, arn:aws:iam::*:role/*Instance*
Use with caution: Check which roles, users or policies fall inside the scope shown above. Within it the escalation works as documented, so keep privileged principals out of it.

Policy Document

View on GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156{
  "PolicyVersion": {
    "CreateDate": "2022-03-04T17:05:09Z",
    "VersionId": "v3",
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Action": [
            "aws-marketplace:ListBuilds",
            "aws-marketplace:StartBuild",
            "aws-marketplace:DescribeBuilds"
          ],
          "Resource": "*",
          "Effect": "Allow"
        },
        {
          "Action": "ec2:TerminateInstances",
          "Resource": "*",
          "Effect": "Allow",
          "Condition": {
            "StringLike": {
              "ec2:ResourceTag/marketplace-image-build:build-id": "*"
            }
          }
        },
        {
          "Action": "iam:PassRole",
          "Resource": [
            "arn:aws:iam::*:role/*Automation*",
            "arn:aws:iam::*:role/*Instance*"
          ],
          "Effect": "Allow",
          "Condition": {
            "StringEquals": {
              "iam:PassedToService": [
                "ec2.amazonaws.com"
              ]
            }
          }
        },
        {
          "Action": [
            "ssm:GetAutomationExecution",
            "ssm:ListDocuments",
            "ssm:DescribeDocument",
            "ec2:DeregisterImage",
            "ec2:CopyImage",
            "ec2:DescribeSnapshots",
            "ec2:DescribeSecurityGroups",
            "ec2:DescribeImages",
            "ec2:DescribeSubnets",
            "ec2:DeleteSnapshot",
            "ec2:CreateImage",
            "ec2:RunInstances",
            "ec2:DescribeInstanceStatus",
            "sns:GetTopicAttributes",
            "iam:GetRole",
            "iam:GetInstanceProfile"
          ],
          "Resource": "*",
          "Effect": "Allow"
        },
        {
          "Action": [
            "s3:GetObject",
            "s3:ListBucket"
          ],
          "Resource": [
            "arn:aws:s3:::*image-build*"
          ],
          "Effect": "Allow"
        },
        {
          "Action": [
            "ec2:CreateTags"
          ],
          "Resource": [
            "arn:aws:ec2:*::image/*",
            "arn:aws:ec2:*:*:instance/*"
          ],
          "Effect": "Allow"
        },
        {
          "Action": [
            "sns:Publish"
          ],
          "Resource": [
            "arn:aws:sns:*:*:*image-build*"
          ],
          "Effect": "Allow"
        },
        {
          "Action": [
            "ssm:StartAutomationExecution"
          ],
          "Resource": [
            "arn:aws:ssm:eu-central-1:906690553262:automation-definition/*",
            "arn:aws:ssm:us-east-1:058657716661:automation-definition/*",
            "arn:aws:ssm:ap-northeast-1:340648487307:automation-definition/*",
            "arn:aws:ssm:eu-west-1:564714592864:automation-definition/*",
            "arn:aws:ssm:us-west-2:243045473901:automation-definition/*",
            "arn:aws:ssm:ap-southeast-2:362149219987:automation-definition/*",
            "arn:aws:ssm:eu-west-2:587945719687:automation-definition/*",
            "arn:aws:ssm:us-east-2:134937423163:automation-definition/*"
          ],
          "Effect": "Allow"
        },
        {
          "Action": [
            "iam:PassRole"
          ],
          "Resource": [
            "*"
          ],
          "Effect": "Allow",
          "Condition": {
            "StringLike": {
              "iam:AssociatedResourceARN": [
                "arn:aws:ssm:eu-central-1:906690553262:automation-definition/*",
                "arn:aws:ssm:us-east-1:058657716661:automation-definition/*",
                "arn:aws:ssm:ap-northeast-1:340648487307:automation-definition/*",
                "arn:aws:ssm:eu-west-1:564714592864:automation-definition/*",
                "arn:aws:ssm:us-west-2:243045473901:automation-definition/*",
                "arn:aws:ssm:ap-southeast-2:362149219987:automation-definition/*",
                "arn:aws:ssm:eu-west-2:587945719687:automation-definition/*",
                "arn:aws:ssm:us-east-2:134937423163:automation-definition/*"
              ],
              "iam:PassedToService": [
                "ssm.amazonaws.com"
              ]
            }
          }
        },
        {
          "Action": [
            "ec2:CreateTags"
          ],
          "Resource": [
            "arn:aws:ec2:*:*:instance/*"
          ],
          "Effect": "Deny",
          "Condition": {
            "StringLike": {
              "aws:RequestTag/marketplace-image-build:build-id": "*"
            },
            "StringNotEquals": {
              "ec2:CreateAction": "RunInstances"
            }
          }
        }
      ]
    },
    "IsDefaultVersion": true
  }
}