CVE-2025-32784

Description

conda-forge-webservices is the web app deployed to run conda-forge admin commands and linting. In versions prior to 2025.4.10, a race condition vulnerability has been identified in the conda-forge-webservices component used within the shared build infrastructure. This vulnerability, categorized as a Time-of-Check to Time-of-Use (TOCTOU) issue, can be exploited to introduce unauthorized modifications to build artifacts stored in the cf-staging Anaconda channel. Exploitation may result in the unauthorized publication of malicious artifacts to the production conda-forge channel. The core vulnerability results from the absence of atomicity between the hash validation and the artifact copy operation. This gap allows an attacker, with access to the cf-staging token, to overwrite the validated artifact with a malicious version immediately after hash verification, but before the copy action is executed. As the cf-staging channel permits artifact overwrites, such an operation can be carried out using the anaconda upload --force command. This vulnerability is fixed in 2025.4.10.

Reserved 2025-04-10 | Published 2025-04-15 | Updated 2025-04-17 | Assigner GitHub_M

Problem types

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

Product status

< 2025.4.10
affected

References

github.com/...rvices/security/advisories/GHSA-28cx-74fp-g2g2

github.com/...ommit/141ed27617068debd150956341551df3a5a3807d

cve.org (CVE-2025-32784)

nvd.nist.gov (CVE-2025-32784)

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