conda-build up to 25.3.x eval code injection

Summaryinfo

A vulnerability was found in conda-build up to 25.3.x. It has been declared as critical. The impacted element is the function eval. Executing a manipulation can lead to code injection. This vulnerability is tracked as CVE-2025-32798. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in conda-build up to 25.3.x and classified as critical. This vulnerability affects the function eval. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Conda-build contains commands and tools to build conda packages. Prior to version 25.4.0, the conda-build recipe processing logic has been found to be vulnerable to arbitrary code execution due to unsafe evaluation of recipe selectors. Currently, conda-build uses the eval function to process embedded selectors in meta.yaml files. This approach evaluates user-defined expressions without proper sanitization, which allows arbitrary code to be executed during the build process. As a result, the integrity of the build environment is compromised, and unauthorized commands or file operations may be performed. The vulnerability stems from the inherent risk of using eval() on untrusted input in a context intended to control dynamic build configurations. By directly interpreting selector expressions, conda-build creates a potential execution pathway for malicious code, violating security assumptions. This issue has been patched in version 25.4.0.

The advisory is available at github.com. This vulnerability was named CVE-2025-32798 since 04/10/2025. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 25.4.0 eliminates this vulnerability. Applying the patch 3d87213b840774a24ab1733664d2b36664233754 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• conda-build

Version

• 25.0
• 25.1
• 25.2
• 25.3

License

• open-source

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CPE 2.2info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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