CVE-2023-31128— NextCloud Cookbook's pull-checks.yml workflow is vulnerable to OS Command Injection
Quick assessment
Affected
nextcloud cookbook
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
NextCloud Cookbook是NextCloud公司的一个菜谱。 NextCloud Cookbook 存在安全漏洞，该漏洞源于使用了不受信任的 字段。
Possible ATT&CK Techniques 3 AI
T1136 · Create Account T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-31128
Vulnerability Information
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Vulnerability Title
NextCloud Cookbook's pull-checks.yml workflow is vulnerable to OS Command Injection
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
NextCloud Cookbook 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NextCloud Cookbook是NextCloud公司的一个菜谱。 NextCloud Cookbook 存在安全漏洞，该漏洞源于使用了不受信任的 `github.head_ref` 字段。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-31128
| # | POC Description | Source Link | Shenlong Link |
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Patches & Fixes for CVE-2023-31128 (2)
-
https://github.com/nextcloud/cookbook/commit/489bb744 x_refsource_MISC
Vendor Advisories for CVE-2023-31128 (1)
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https://github.com/nextcloud/cookbook/security/advisories/GHSA-c5pc-mf2f-xq8h x_refsource_CONFIRM
Security Blog Posts for CVE-2023-31128 (1)
Other References for CVE-2023-31128 (1)
Same Patch Batch · nextcloud · 2023-05-26 · 3 CVEs total
| CVE-2023-32319 | 8.1 HIGH | Basic auth header on WebDAV requests is not brute-force protected in Nextcloud |
| CVE-2023-32318 | 7.2 HIGH | User session not correctly destroyed on logout |
IV. Related Vulnerabilities
Same weakness: CWE-78
V. Comments for CVE-2023-31128
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