AWS fixes cloud development kit security flaw that could allow for complete account takeover

Amazon Web Services (AWS) has fixed a information flaw successful its Cloud Development Kit (CDK) which could person allowed threat actors to afloat return complete people’s accounts.

The AWS Cloud Development Kit (CDK) is an open source package improvement model that allows developers to specify unreality infrastructure utilizing acquainted programming languages for illustration TypeScript, Python, and Java. It simplifies nan process of creating and managing AWS resources by converting codification into AWS CloudFormation templates, enabling infrastructure arsenic codification (IaC) practices.

In bid to deploy an app, users are first required to bootstrap nan environment, which includes creating basal components specified arsenic personality and entree guidance (IAM) ropes, permissions, policies, and an S3 staging bucket. The S3 staging buckets travel nan aforesaid naming pattern: "cdk-{Qualifier}-{Description}-{Account-ID}-{Region}". That means, crooks tin easy foretell nan name, arsenic agelong arsenic they cognize nan AWS Account-ID, and nan region successful which nan CDK is deployed.

Thousands of instances

“Since nan Prefix is ever cdk, nan Qualifier is by default hnb659fds, and assets is simply a changeless drawstring successful nan bucket name, nan only variables that alteration are nan Account ID and nan Region,” explained cybersecurity researchers from Aqua, who first spotted nan flaw.

This intends crooks could declare personification else’s CDK staging bucket sanction successful advance, preload it pinch malware, and past conscionable hold for nan unfortunate to tally it.

To make matters worse, Aqua says location are “thousands” of instances pinch nan default qualifier being utilized successful nan bootstrap process, making it ace easy to declare different user’s CDK staging bucket name. In fact, nan problem could "allow an attacker to summation administrative entree to a target AWS account, resulting successful a afloat relationship takeover," nan pros explained.

Aqua reported nan flaw to Amazon, who patched it successful early July this year, it was said. The first cleanable CDK type is v2.149.0.

Via The Register

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