CVE-2023-31128: NextCloud Cookbook's pull-checks.yml workflow is vulnerable to OS Command Injection
First published: Fri May 26 2023(Updated: )
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.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| NextCloud Cookbook | >=0.9.0<0.9.19 |
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Reference Links
- https://github.com/nextcloud/cookbook/commit/489bb744
- https://github.com/nextcloud/cookbook/blob/a14d6ffc4d45e1447556f68606129dfd6c1505cf/.github/workflows/pull-checks.yml#L67
- https://github.com/nextcloud/cookbook/commit/a46d98559e2c64292da9ffb06138cccc2e50ae1b
- https://github.com/nextcloud/cookbook/security/advisories/GHSA-c5pc-mf2f-xq8h
- https://securitylab.github.com/research/github-actions-untrusted-input/
Frequently Asked Questions
What is CVE-2023-31128?
CVE-2023-31128 is a vulnerability in NextCloud Cookbook, a recipe library app, that allows command injection attacks.
How severe is CVE-2023-31128?
CVE-2023-31128 is considered high severity with a CVSS score of 8.8.
What software is affected by CVE-2023-31128?
NextCloud Cookbook versions 0.9.0 through 0.9.19 are affected by CVE-2023-31128.
How can I fix CVE-2023-31128?
To fix CVE-2023-31128, update NextCloud Cookbook to a version after commit a46d9855 on the `master` branch or commit 489bb744 on the `main-0.9.x` branch.
What are the CWE identifiers for CVE-2023-31128?
The CWE identifiers for CVE-2023-31128 are CWE-77, CWE-94, and CWE-78.
- collector/nvd-latest
- collector/nvd-index
- agent/remedy
- agent/type
- agent/softwarecombine
- agent/title
- agent/references
- agent/author
- agent/weakness
- agent/severity
- agent/first-publish-date
- agent/event
- agent/description
- agent/tags
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- vendor/nextcloud
- canonical/nextcloud cookbook
- version/nextcloud cookbook/0.9.0