Shopify Access Token (Public App) Detection Scanner

Shopify is widely used by e-commerce vendors to set up online stores and manage their business operations, such as tracking inventory, processing orders, and customizing storefronts. It facilitates merchants in building scalable websites tailored to their business needs, through a user-friendly interface and rich features. With the capability to integrate apps for additional functionalities, Shopify empowers businesses of various sizes, from small startups to large enterprises. Developers and third-party applications use Shopify's API to enhance store functionalities, which makes secure access management crucial. The proper management of access credentials is vital for ensuring that only authorized applications and users can interact with the store's sensitive data. In this context, safeguarding tokens from exposure is essential to maintain the integrity and security of Shopify stores.

Token exposure in Shopify refers to the unintended release of an access token, which is crucial for authenticating API calls in a public application. These tokens are sensitive in nature as they grant access to a multitude of store operations and sensitive data, when in unauthorized hands. Token exposure can occur if the tokens are embedded in the application’s source code and pushed to public repositories inadvertently. Regular audits and secure storage practices for tokens are essential to mitigate the risk of token exposure. Implementing least privilege principles and limited token lifetimes can prevent abuse of exposed tokens. The vulnerability can lead to significant security implications if not correctly managed.

Technically, this vulnerability involves access tokens being publicly exposed due to improper handling or oversight in application development or deployment phases. Such exposure can be identified by searching for patterns associated with token formats within the app's code or network activity. Common techniques include regular expression-based scanning of code repositories or server response body to detect any occurrence of token patterns. Exposure typically happens when tokens are included in client-side code, logs, or network communications without adequate masking. These tokens, if compromised, permit API access, thus potentially impacting the store's security. Secure development practices and static code analysis tools can help in preemptively identifying these exposures.

Exploiting a token exposure vulnerability allows malicious actors to perform unauthorized actions on behalf of the Shopify store owner, potentially leading to data theft, financial loss, or reputational damage. Attackers can execute API calls to view, modify, or delete store data, leading to severe business disruptions. There may also be a potential for attackers to embed malicious orders, tamper with products and pricing, or disclose sensitive customer information. The unauthorized modification of store settings and configurations can lead to prolonged security incidents before detection. Store owners need to be vigilant about securing and auditing all access credentials to mitigate such risks.

REFERENCES

• https://github.com/praetorian-inc/noseyparker/blob/main/data/default/rules/shopify.yml
• https://shopify.dev/apps/auth
• https://shopify.dev/changelog/app-secret-key-length-has-increased