Vulnerability Description
NextCloud Cookbook is a recipe library app. Prior to commit a46d9855 on the `master` branch and commit 489bb744 on the `main-0.9.x` branch, the `pull-checks.yml` workflow is vulnerable to command injection attacks because of using an untrusted `github.head_ref` field. The `github.head_ref` value is an attacker-controlled value. Assigning the value to `zzz";echo${IFS}"hello";#` can lead to command injection. Since the permission is not restricted, the attacker has a write-access to the repository. This issue is fixed in commit a46d9855 on the `master` branch and commit 489bb744 on the `main-0.9.x` branch. There is no risk for the user of the app within the NextCloud server. This only affects the main repository and possible forks of it. Those who have forked the NextCloud Cookbook repository should make sure their forks are on the latest version to prevent code injection attacks and similar.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Cookbook | >= 0.9.0, < 0.9.19 |
Related Weaknesses (CWE)
References
- https://github.com/nextcloud/cookbook/blob/a14d6ffc4d45e1447556f68606129dfd6c150Product
- https://github.com/nextcloud/cookbook/commit/489bb744Patch
- https://github.com/nextcloud/cookbook/commit/a46d98559e2c64292da9ffb06138cccc2e5Patch
- https://github.com/nextcloud/cookbook/security/advisories/GHSA-c5pc-mf2f-xq8hVendor Advisory
- https://securitylab.github.com/research/github-actions-untrusted-input/ExploitThird Party Advisory
- https://github.com/nextcloud/cookbook/blob/a14d6ffc4d45e1447556f68606129dfd6c150Product
- https://github.com/nextcloud/cookbook/commit/489bb744Patch
- https://github.com/nextcloud/cookbook/commit/a46d98559e2c64292da9ffb06138cccc2e5Patch
- https://github.com/nextcloud/cookbook/security/advisories/GHSA-c5pc-mf2f-xq8hVendor Advisory
- https://securitylab.github.com/research/github-actions-untrusted-input/ExploitThird Party Advisory
- https://github.com/nextcloud/cookbook/security/advisories/GHSA-c5pc-mf2f-xq8hVendor Advisory
FAQ
What is CVE-2023-31128?
CVE-2023-31128 is a vulnerability with a CVSS score of 8.1 (HIGH). NextCloud Cookbook is a recipe library app. Prior to commit a46d9855 on the `master` branch and commit 489bb744 on the `main-0.9.x` branch, the `pull-checks.yml` workflow is vulnerable to command inje...
How severe is CVE-2023-31128?
CVE-2023-31128 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-31128?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Cookbook.