CVE-2021-32699: Github.com/pterodactyl/wings Remote Code Execution Vulnerability

MODERATE
Advisory Identifier: GHSA-jj6m-r8jc-2gp7
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CVSS 6.5
CWE-405 CWE-770
Published
Advisory Summary

CVE-2021-32699 is a MODERATE (CVSS 6.5) remote code execution vulnerability (CWE-405: Asymmetric Resource Consumption (Amplification)) affecting Github.com/pterodactyl/wings libraries in the Go ecosystem. The issue involves asymmetric resource consumption (amplification) in docker containers created by wings. Remediation is available by upgrading affected packages to version 1.4.4.

CVE-2021-32699 at a Glance

CVE Identifier CVE-2021-32699
GHSA Identifier GHSA-jj6m-r8jc-2gp7
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-405: Asymmetric Resource Consumption (Amplification)
Affected Product Github.com/pterodactyl/wings
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2021-32699

To remediate this vulnerability, upgrade all affected Github.com/pterodactyl/wings dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/pterodactyl/wings fixed: 1.4.4 
Upgrade github.com/pterodactyl/wings to 1.4.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/pterodactyl/wings

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-32699, inspect your project dependencies for Github.com/pterodactyl/wings:

inspect dependencies for github.com/pterodactyl/wings

Analyze the terminal output to locate any version of Github.com/pterodactyl/wings in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.4.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-405: Asymmetric Resource Consumption (Amplification), where the product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric.". In Github.com/pterodactyl/wings, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact All versions of Pterodactyl Wings preior to `1.4.4` are vulnerable to system resource exhaustion due to improper container process limits being defined. A malicious user can consume more resources than intended and cause downstream impacts to other clients on the same hardware, eventually causing the physical server to stop responding. ### Patches Users should upgrade to `1.4.4`. ### Workarounds There is no non-code based workaround for impacted versions of the software. Users running customized versions of this software can manually set a PID limit for containers created. ### For more information If you have any questions or comments about this advisory: * Contact us on [Discord](https://discord.gg/pterodactyl) * Email us at `dane ät pterodactyl dot io`

CVE-2021-32699 Affected Github.com/pterodactyl/wings Versions

1 component(s)
Fixed Versions:
1.4.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/pterodactyl/wings
golang/github.com/pterodactyl/wings
Go
< 1.4.4
1.4.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pterodactyl/wings/security/advisories/GHSA-jj6m-r8jc-2gp7
NVD — CVE-2021-32699 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32699
Security Fix Commit FIX COMMIT
https://github.com/pterodactyl/wings/commit/e0078eee0a71d61573a94c75e6efcad069d78de3
Github.com/pterodactyl/wings Source Repository REPOSITORY
https://github.com/pterodactyl/wings

Frequently Asked Questions

What is CVE-2021-32699?
CVE-2021-32699 is a security vulnerability in Github.com/pterodactyl/wings involving Asymmetric Resource Consumption (Amplification) in Docker containers created by Wings under CWE-405: Asymmetric Resource Consumption (Amplification).
Which Github.com/pterodactyl/wings versions are affected?
Affected versions include releases prior to 1.4.4 across affected packages: github.com/pterodactyl/wings.
What version fixes CVE-2021-32699?
Upgrading to 1.4.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/pterodactyl/wings affected?
Yes, github.com/pterodactyl/wings is affected in releases prior to 1.4.4. Upgrade your dependency to 1.4.4 or later.
What is the CVSS score of CVE-2021-32699?
CVE-2021-32699 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
What CWE is associated with CVE-2021-32699?
CVE-2021-32699 is classified under CWE-405: Asymmetric Resource Consumption (Amplification) (The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric.").
How can I check Go dependencies for CVE-2021-32699?
Run the dependency tree command: 'inspect dependencies for github.com/pterodactyl/wings'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jj6m-r8jc-2gp7",
  "modified" : "2022-10-25T20:24:52Z",
  "published" : "2021-06-23T18:03:18Z",
  "aliases" : [ "CVE-2021-32699" ],
  "summary" : "Asymmetric Resource Consumption (Amplification) in Docker containers created by Wings ",
  "details" : "### Impact\nAll versions of Pterodactyl Wings preior to `1.4.4` are vulnerable to system resource exhaustion due to improper container process limits being defined. A malicious user can consume more resources than intended and cause downstream impacts to other clients on the same hardware, eventually causing the physical server to stop responding.\n\n### Patches\nUsers should upgrade to `1.4.4`.\n\n### Workarounds\nThere is no non-code based workaround for impacted versions of the software. Users running customized versions of this software can manually set a PID limit for containers created.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Contact us on [Discord](https://discord.gg/pterodactyl)\n* Email us at `dane ät pterodactyl dot io`",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/pterodactyl/wings"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.4.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pterodactyl/wings/security/advisories/GHSA-jj6m-r8jc-2gp7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-32699"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pterodactyl/wings/commit/e0078eee0a71d61573a94c75e6efcad069d78de3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pterodactyl/wings"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-405", "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-06-22T15:43:57Z",
    "nvd_published_at" : "2021-06-22T20:15:00Z"
  }
}