A vulnerability was found in AWS SDK 2.59.0. It has been rated as critical. This issue affects the function XpathUtils of the file aws-android-sdk-core/src/main/java/com/amazonaws/util/XpathUtils.java of the component XML Parser. The manipulation leads to server-side request forgery. Upgrading to version 2.59.1 is able to address this issue. The name of the patch is c3e6d69422e1f0c80fe53f2d757b8df97619af2b. It is recommended to upgrade the affected component. The identifier VDB-216737 was assigned to this vulnerability.
Amazon AWS SDK <=2.8.5 for Android uses Android SharedPreferences to store plain text AWS STS Temporary Credentials retrieved by AWS Cognito Identity Service. An attacker can use these credentials to create authenticated and/or authorized requests. Note that the attacker must have "root" privilege access to the Android filesystem in order to exploit this vulnerability (i.e. the device has been compromised, such as disabling or bypassing Android's fundamental security mechanisms).
Impact Within the scope of requests to S3 object keys and/or prefixes containing a Unix double-dot, a URI path traversal is possible. The issue exists in thebuildEndpoint method in the RestSerializer component of the AWS SDK for PHP v3 prior to 3.288.1. The buildEndpoint method relies on the Guzzle Psr7 UriResolver utility, which strips dot segments from the request path in accordance with RFC 3986. Under certain conditions, this could lead to an arbitrary object being accessed.
Versions of the AWS SDK for PHP v3 before 3.288.1 are affected by this issue.
Patches Upgrade to the AWS SDK for PHP >= 3.288.1, if you are on version < 3.288.1.
References RFC 3986 - https://datatracker.ietf.org/doc/html/rfc3986
For more information If you have any questions or comments about this advisory, please contact AWS's Security team.
The AWS S3 Crypto SDK sends an unencrypted hash of the plaintext alongside the ciphertext as a metadata field. This hash can be used to brute force the plaintext, if the hash is readable to the attacker. AWS now blocks this metadata field, but older SDK versions still send it.