Secret leaks often occur when a sensitive piece of authentication data is stored with the source code of an application. Considering the source code is intended to be deployed across multiple assets, including source code repositories or application hosting servers, the secrets might get exposed to an unintended audience.
In most cases, trust boundaries are violated when a secret is exposed in a source code repository or an uncontrolled deployment environment. Unintended people who don’t need to know the secret might get access to it. They might then be able to use it to gain unwanted access to associated services or resources.
The trust issue can be more or less severe depending on the people’s role and entitlement.
If an attacker gains access to an NPM access token, they might be able to gain access to any private package linked to this token.
The exact impact of the compromise of an NPM access token varies depending on the permissions granted to this token. It can range from loss of sensitive data and source code to severe supply chain attacks.
The affected service is used to store private packages and repositories. If a token is leaked, it can be used by unauthorized individuals to gain access to your sensitive code, proprietary libraries, and other confidential resources. This can lead to intellectual property theft, unauthorized modifications, or even sabotage of your software.
If these private packages contain other secrets, it might even lead to further breaches in the organization’s services.
If the leaked secret gives an attacker the ability to publish code to private packages or repositories under the name of the organization, then there may exist grave consequences beyond the compromise of source code. The attacker may inject malware, backdoors, or other harmful code into these private repositories.
This can cause further security breaches inside the organization, but will also affect clients if the malicious code gets added to any products. Distributing code that (unintentionally) contains backdoors or malware can lead to widespread security vulnerabilities, reputational damage, and potential legal liabilities.
Revoke the secret
Revoke any leaked secrets and remove them from the application source code.
Before revoking the secret, ensure that no other applications or processes are using it. Other usages of the secret will also be impacted when the secret is revoked.
Use a secret vault
A secret vault should be used to generate and store the new secret. This will ensure the secret’s security and prevent any further unexpected disclosure.
Depending on the development platform and the leaked secret type, multiple solutions are currently available.
steps:
- run: |
npm install
- env:
NPM_TOKEN: npm_tCEMceczuiTXKQaBjGIaAezYQ63PqI972ANG
steps:
- run: |
npm install
- env:
NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
By reducing the permission scope, the token is granted only the minimum set of permissions required to perform its intended tasks. This follows the principle of least privilege, which states that a user or token should have only the necessary privileges to carry out its specific functions. By adhering to this principle, the potential attack surface is minimized, reducing the risk of unauthorized access or misuse of sensitive resources.
Additionally, if a token is compromised, the reduced permissions scope limits the potential damage that can be done. With fewer permissions, the attacker’s ability to access or modify critical resources is restricted, reducing the impact of the compromise.
npm Docs - Revoking access tokens