Exposure of Sensitive Information to an Unauthorized Actor in Doorkeeper

CVE-2020-10187 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

Information disclosure vulnerability. Allows an attacker to see all Doorkeeper::Application model attribute values (including secrets) using authorized applications controller if it's enabled (GET /oauth/authorized_applications.json).

Patches

These versions have the fix:

  • 5.0.3
  • 5.1.1
  • 5.2.5
  • 5.3.2

Workarounds

Patch Doorkeeper::Application model #as_json(options = {}) method and define only those attributes you want to expose.

Additional recommended hardening is to enable application secrets hashing (guide), available since Doorkeeper 5.1. This would render the exposed secret useless.

References

  • Commit with fix: https://github.com/doorkeeper-gem/doorkeeper/commit/25d038022c2fcad45af5b73f9d003cf38ff491f6
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10187

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Not specified
Published (advisory)
2020-05-07 21:11:07 UTC
Updated
2023-05-04 19:47:01 UTC
GitHub reviewed
2020-05-07 21:09:24 UTC
NVD published
2020-05-04

EPSS Score

Score Percentile
0.43% 61.53%

CVSS Scores

Base score Version Severity Vector
7.5 3.1 —
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

Type Value
GHSA GHSA-j7vx-8mqj-cqp9 ↗
CVE CVE-2020-10187 ↗

CWEs

CWE id Name
CWE-862 Missing Authorization

Credits

  • stefansundin (analyst)
  • nbulaj (analyst)

Affected packages (4)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
rubygems doorkeeper >= 5.0.0, < 5.0.3 5.0.3 —
rubygems doorkeeper = 5.1.0 5.1.1 —
rubygems doorkeeper >= 5.2.0, < 5.2.5 5.2.5 —
rubygems doorkeeper >= 5.3.0, < 5.3.2 5.3.2 —

References

cvelogic Threat Intelligence