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[Security] Fix GraphQL query to get a collaborator's permission #301

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merged 1 commit into from
Dec 10, 2023

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@0xn3va 0xn3va commented Dec 10, 2023

I am terribly sorry for opening a public pull request with the fix for this vulnerability. I tried to reach out to you multiple times via X(Twitter), email from https://peterevans.dev/, and LinkedIn but didn't hear back from you. Plus, there is no security policy, so the only option left is opening a pull request.

The action uses the following GraphQL query to get the permissions of a user who triggered the action:

  async getActorPermission(repo: Repository, actor: string): Promise<string> {
    const query = `query CollaboratorPermission($owner: String!, $repo: String!, $collaborator: String) {
      repository(owner:$owner, name:$repo) {
        collaborators(query: $collaborator) {
          edges {
            permission
          }
        }
      }
    }`

The problem is that the $collaborator variable is passed to the query parameter which implements the fuzzy search. In other words, you can use an outside user with a username close to a maintainer username to bypass the permissions validation.

For example, the query above will return the ADMIN permission with the following variables:

  • owner: peter-evans
  • name: slash-command-dispatch
  • collaborator: eter-evans (note there is no the first letter p)

So, it means that an attacker can find users with required permissions in a target repository, create a user with a close name (like eter-evans), and bypass the permissions validation using that user.

To avoid this behaviour, the login parameter must be used instead of query.

@peter-evans peter-evans merged commit f996d7b into peter-evans:main Dec 10, 2023
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@peter-evans
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Hi @0xn3va

Thank you for raising this PR! Apologies for missing your attempts to contact me about this. I vaguely recall seeing something, but I get a lot of random email and messages and sometimes it's not easy to figure out what is genuine and what is spam. Thank you for your effort to get this fixed, I do appreciate it.

I've released the fix as v3.0.2 / v3.

renovate bot referenced this pull request in Hapag-Lloyd/dist-comm-vis Dec 10, 2023
….2 (#164)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[peter-evans/slash-command-dispatch](https://github.com/peter-evans/slash-command-dispatch)
| action | patch | `v3.0.1` -> `v3.0.2` |

---

### Release Notes

<details>
<summary>peter-evans/slash-command-dispatch
(peter-evans/slash-command-dispatch)</summary>

###
[`v3.0.2`](https://github.com/peter-evans/slash-command-dispatch/releases/tag/v3.0.2):
Slash Command Dispatch v3.0.2

[Compare
Source](https://github.com/peter-evans/slash-command-dispatch/compare/v3.0.1...v3.0.2)

#### What's Changed

- fix: replace use of any type by
[@&#8203;peter-evans](https://github.com/peter-evans) in
[https://github.com/peter-evans/slash-command-dispatch/pull/152](https://github.com/peter-evans/slash-command-dispatch/pull/152)
- fixing link to `Get a pull request` by
[@&#8203;Borda](https://github.com/Borda) in
[https://github.com/peter-evans/slash-command-dispatch/pull/270](https://github.com/peter-evans/slash-command-dispatch/pull/270)
- Update getting-started.md due to changes in Github UI by
[@&#8203;martin-displayr](https://github.com/martin-displayr) in
[https://github.com/peter-evans/slash-command-dispatch/pull/289](https://github.com/peter-evans/slash-command-dispatch/pull/289)
- \[Security] Fix GraphQL query to get a collaborator's permission by
[@&#8203;0xn3va](https://github.com/0xn3va) in
[https://github.com/peter-evans/slash-command-dispatch/pull/301](https://github.com/peter-evans/slash-command-dispatch/pull/301)
- 129 dependency updates by
[@&#8203;dependabot](https://github.com/dependabot)

#### New Contributors

- [@&#8203;Borda](https://github.com/Borda) made their first
contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/270](https://github.com/peter-evans/slash-command-dispatch/pull/270)
- [@&#8203;martin-displayr](https://github.com/martin-displayr) made
their first contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/289](https://github.com/peter-evans/slash-command-dispatch/pull/289)
- [@&#8203;0xn3va](https://github.com/0xn3va) made their first
contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/301](https://github.com/peter-evans/slash-command-dispatch/pull/301)

**Full Changelog**:
peter-evans/slash-command-dispatch@v3.0.1...v3.0.2

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
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---

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---

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
renovate bot referenced this pull request in Hapag-Lloyd/.github Dec 10, 2023
….2 (#9)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[peter-evans/slash-command-dispatch](https://github.com/peter-evans/slash-command-dispatch)
| action | patch | `v3.0.1` -> `v3.0.2` |

---

### Release Notes

<details>
<summary>peter-evans/slash-command-dispatch
(peter-evans/slash-command-dispatch)</summary>

###
[`v3.0.2`](https://github.com/peter-evans/slash-command-dispatch/releases/tag/v3.0.2):
Slash Command Dispatch v3.0.2

[Compare
Source](https://github.com/peter-evans/slash-command-dispatch/compare/v3.0.1...v3.0.2)

#### What's Changed

- fix: replace use of any type by
[@&#8203;peter-evans](https://github.com/peter-evans) in
[https://github.com/peter-evans/slash-command-dispatch/pull/152](https://github.com/peter-evans/slash-command-dispatch/pull/152)
- fixing link to `Get a pull request` by
[@&#8203;Borda](https://github.com/Borda) in
[https://github.com/peter-evans/slash-command-dispatch/pull/270](https://github.com/peter-evans/slash-command-dispatch/pull/270)
- Update getting-started.md due to changes in Github UI by
[@&#8203;martin-displayr](https://github.com/martin-displayr) in
[https://github.com/peter-evans/slash-command-dispatch/pull/289](https://github.com/peter-evans/slash-command-dispatch/pull/289)
- \[Security] Fix GraphQL query to get a collaborator's permission by
[@&#8203;0xn3va](https://github.com/0xn3va) in
[https://github.com/peter-evans/slash-command-dispatch/pull/301](https://github.com/peter-evans/slash-command-dispatch/pull/301)
- 129 dependency updates by
[@&#8203;dependabot](https://github.com/dependabot)

#### New Contributors

- [@&#8203;Borda](https://github.com/Borda) made their first
contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/270](https://github.com/peter-evans/slash-command-dispatch/pull/270)
- [@&#8203;martin-displayr](https://github.com/martin-displayr) made
their first contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/289](https://github.com/peter-evans/slash-command-dispatch/pull/289)
- [@&#8203;0xn3va](https://github.com/0xn3va) made their first
contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/301](https://github.com/peter-evans/slash-command-dispatch/pull/301)

**Full Changelog**:
peter-evans/slash-command-dispatch@v3.0.1...v3.0.2

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/Hapag-Lloyd/.github).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy44Ny4yIiwidXBkYXRlZEluVmVyIjoiMzcuODcuMiIsInRhcmdldEJyYW5jaCI6Im1haW4ifQ==-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
renovate bot referenced this pull request in Hapag-Lloyd/Renovate-Global-Configuration Dec 10, 2023
….2 (#59)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[peter-evans/slash-command-dispatch](https://github.com/peter-evans/slash-command-dispatch)
| action | patch | `v3.0.1` -> `v3.0.2` |

---

### Release Notes

<details>
<summary>peter-evans/slash-command-dispatch
(peter-evans/slash-command-dispatch)</summary>

###
[`v3.0.2`](https://github.com/peter-evans/slash-command-dispatch/releases/tag/v3.0.2):
Slash Command Dispatch v3.0.2

[Compare
Source](https://github.com/peter-evans/slash-command-dispatch/compare/v3.0.1...v3.0.2)

#### What's Changed

- fix: replace use of any type by
[@&#8203;peter-evans](https://github.com/peter-evans) in
[https://github.com/peter-evans/slash-command-dispatch/pull/152](https://github.com/peter-evans/slash-command-dispatch/pull/152)
- fixing link to `Get a pull request` by
[@&#8203;Borda](https://github.com/Borda) in
[https://github.com/peter-evans/slash-command-dispatch/pull/270](https://github.com/peter-evans/slash-command-dispatch/pull/270)
- Update getting-started.md due to changes in Github UI by
[@&#8203;martin-displayr](https://github.com/martin-displayr) in
[https://github.com/peter-evans/slash-command-dispatch/pull/289](https://github.com/peter-evans/slash-command-dispatch/pull/289)
- \[Security] Fix GraphQL query to get a collaborator's permission by
[@&#8203;0xn3va](https://github.com/0xn3va) in
[https://github.com/peter-evans/slash-command-dispatch/pull/301](https://github.com/peter-evans/slash-command-dispatch/pull/301)
- 129 dependency updates by
[@&#8203;dependabot](https://github.com/dependabot)

#### New Contributors

- [@&#8203;Borda](https://github.com/Borda) made their first
contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/270](https://github.com/peter-evans/slash-command-dispatch/pull/270)
- [@&#8203;martin-displayr](https://github.com/martin-displayr) made
their first contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/289](https://github.com/peter-evans/slash-command-dispatch/pull/289)
- [@&#8203;0xn3va](https://github.com/0xn3va) made their first
contribution in
[https://github.com/peter-evans/slash-command-dispatch/pull/301](https://github.com/peter-evans/slash-command-dispatch/pull/301)

**Full Changelog**:
peter-evans/slash-command-dispatch@v3.0.1...v3.0.2

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/Hapag-Lloyd/Renovate-Global-Configuration).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy44Ny4yIiwidXBkYXRlZEluVmVyIjoiMzcuODcuMiIsInRhcmdldEJyYW5jaCI6Im1haW4ifQ==-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
@frederikb
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Just as a heads-up for anyone running into this error:

Error: Request failed due to following response errors:
 - Field 'collaborators' doesn't accept argument 'login'
 - Variable $collaborator is declared by CollaboratorPermission but not used

v3 of this action now requires GitHub Enterprise Server >= 3.9.

Earlier versions do not expose the login field on collaborators as confirmed by comparing the GraphQL schemas:

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3 participants