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AWS - STS Persistence

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STS

Kwa maelezo zaidi tembelea:

AWS - STS Enum

Assume role token

Token za muda haziwezi kuorodheshwa, hivyo kudumisha token ya muda inayofanya kazi ni njia ya kudumisha uvumilivu.

aws sts get-session-token --duration-seconds 129600

# With MFA
aws sts get-session-token \
--serial-number <mfa-device-name> \
--token-code <code-from-token>

# Jina la kifaa cha vifaa mara nyingi ni nambari kutoka nyuma ya kifaa, kama GAHT12345678
# Jina la kifaa cha SMS ni ARN katika AWS, kama arn:aws:iam::123456789012:sms-mfa/username
# Jina la kifaa cha Virtual ni ARN katika AWS, kama arn:aws:iam::123456789012:mfa/username

Role Chain Juggling

Role chaining ni kipengele kinachotambulika cha AWS, mara nyingi hutumiwa kwa ajili ya kudumisha uvumilivu wa siri. Inahusisha uwezo wa kuchukua jukumu ambalo kisha linachukua jingine, huenda ikarejea kwenye jukumu la awali kwa njia ya mzunguko. Kila wakati jukumu linapochukuliwa, uwanja wa muda wa kuisha wa ithibati unarefreshwa. Kwa hivyo, ikiwa majukumu mawili yamewekwa ili kuchukua kila mmoja, mpangilio huu unaruhusu upya wa kudumu wa ithibati.

Unaweza kutumia chombo hiki kudumisha mchakato wa kuchanganya majukumu:

./aws_role_juggler.py -h
usage: aws_role_juggler.py [-h] [-r ROLE_LIST [ROLE_LIST ...]]

optional arguments:
-h, --help            show this help message and exit
-r ROLE_LIST [ROLE_LIST ...], --role-list ROLE_LIST [ROLE_LIST ...]

Kumbuka kwamba skripti ya find_circular_trust.py kutoka kwenye hifadhi hiyo ya Github haipati njia zote ambazo mnyororo wa jukumu unaweza kuundwa.

Code ya kufanya Role Juggling kutoka PowerShell

```powershell # PowerShell script to check for role juggling possibilities using AWS CLI

Check for AWS CLI installation

if (-not (Get-Command "aws" -ErrorAction SilentlyContinue)) { Write-Error "AWS CLI is not installed. Please install it and configure it with 'aws configure'." exit }

Function to list IAM roles

function List-IAMRoles { aws iam list-roles --query "Roles[*].{RoleName:RoleName, Arn:Arn}" --output json }

Initialize error count

$errorCount = 0

List all roles

$roles = List-IAMRoles | ConvertFrom-Json

Attempt to assume each role

foreach ($role in $roles) { $sessionName = "RoleJugglingTest-" + (Get-Date -Format FileDateTime) try { $credentials = aws sts assume-role --role-arn $role.Arn --role-session-name $sessionName --query "Credentials" --output json 2>$null | ConvertFrom-Json if ($credentials) { Write-Host "Successfully assumed role: $($role.RoleName)" Write-Host "Access Key: $($credentials.AccessKeyId)" Write-Host "Secret Access Key: $($credentials.SecretAccessKey)" Write-Host "Session Token: $($credentials.SessionToken)" Write-Host "Expiration: $($credentials.Expiration)"

Set temporary credentials to assume the next role

$env:AWS_ACCESS_KEY_ID = $credentials.AccessKeyId $env:AWS_SECRET_ACCESS_KEY = $credentials.SecretAccessKey $env:AWS_SESSION_TOKEN = $credentials.SessionToken

Try to assume another role using the temporary credentials

foreach ($nextRole in $roles) { if ($nextRole.Arn -ne $role.Arn) { $nextSessionName = "RoleJugglingTest-" + (Get-Date -Format FileDateTime) try { $nextCredentials = aws sts assume-role --role-arn $nextRole.Arn --role-session-name $nextSessionName --query "Credentials" --output json 2>$null | ConvertFrom-Json if ($nextCredentials) { Write-Host "Also successfully assumed role: $($nextRole.RoleName) from $($role.RoleName)" Write-Host "Access Key: $($nextCredentials.AccessKeyId)" Write-Host "Secret Access Key: $($nextCredentials.SecretAccessKey)" Write-Host "Session Token: $($nextCredentials.SessionToken)" Write-Host "Expiration: $($nextCredentials.Expiration)" } } catch { $errorCount++ } } }

Reset environment variables

Remove-Item Env:\AWS_ACCESS_KEY_ID Remove-Item Env:\AWS_SECRET_ACCESS_KEY Remove-Item Env:\AWS_SESSION_TOKEN } else { $errorCount++ } } catch { $errorCount++ } }

Output the number of errors if any

if ($errorCount -gt 0) { Write-Host "$errorCount error(s) occurred during role assumption attempts." } else { Write-Host "No errors occurred. All roles checked successfully." }

Write-Host "Role juggling check complete."

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