Summary
AWS Directory Service didn't check the iam:PassRole permissions when using the
EnableRoleAccess action. This could have been used for privilege escalation by an
authenticated user with sufficient permissions (ds:EnableRoleAccess), if the
role had a trust policy that allowed use by Directory Service.
Affected Services
Directory Service
Remediation
None required
Tracked CVEs
No tracked CVEs
References
https://cloudar.be/awsblog/spotted-privilege-escalation-in-aws-directory-service/https://aws.amazon.com/security/security-bulletins/AWS-2023-003/
Contributed by https://github.com/benbridts
Disclosure Date
Fri, Apr 7th, 2023
Exploitablity Period
Until 2023-04-24
Known ITW Exploitation
-
Detection Methods
Roles trusting Directory Service being assumed by unexpected users.
Piercing Index Rating
5.29
(PI:1.5/A3:1/A4:1/A5:1/A6:6/A7:1.1)
Discovered by
Ben Bridts, Cloudar
