CVE-2025-49843: Permission Flaw

Description

conda-smithy is a tool for combining a conda recipe with configurations to build using freely hosted CI services into a single repository. Prior to version 3.47.1, the travis_headers function in the conda-smithy repository creates files with permissions exceeding 0o600, allowing read and write access beyond the intended user/owner. This violates the principle of least privilege, which mandates restricting file permissions to the minimum necessary. An attacker could exploit this to access configuration files in shared hosting environments. This issue has been patched in version 3.47.1.

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Weakness Type (CWE)

CWE-276 Incorrect Default Permissions

References

Other References

https://github.com/conda-forge/conda-smithy/blob/1dc21086a476f6aeb6c1bad8bf58474bf3a8f8f0/conda_smithy/ci_register.py#L109-L111 https://github.com/conda-forge/conda-smithy/commit/24cc0a55a363479e797c825be3a7f2603ef374a1 https://github.com/conda-forge/conda-smithy/security/advisories/GHSA-h9v8-rrqg-3m95

Frequently Asked Questions

What is CVE-2025-49843? +

conda-smithy is a tool for combining a conda recipe with configurations to build using freely hosted CI services into a single repository. Prior to version 3.47.1, the travis_headers function in the conda-smithy repository creates files with permissions exceeding 0o600, allowing read and write access beyond the intended user/owner. This violates the principle of least privilege, which mandates restricting file permissions to the minimum necessary. An attacker could exploit this to access configuration files in shared hosting environments. This issue has been patched in version 3.47.1.

How do I check if I'm vulnerable to CVE-2025-49843? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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