CVE-2021-42009: Github.com/apache/trafficcontrol Email Relay Vulnerability

MODERATE
Advisory Identifier: GHSA-gw97-f6h8-gm94
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CVSS 4.3
CWE-20
Published
Advisory Summary

CVE-2021-42009 is a MODERATE (CVSS 4.3) email relay vulnerability (CWE-20: Improper Input Validation) affecting Github.com/apache/trafficcontrol libraries in the Go ecosystem. The issue involves email relay in apache traffic control. Remediation is available by upgrading affected packages to version 5.1.3.

CVE-2021-42009 at a Glance

CVE Identifier CVE-2021-42009
GHSA Identifier GHSA-gw97-f6h8-gm94
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-20: Improper Input Validation
Affected Product Github.com/apache/trafficcontrol
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2021-42009

To remediate this vulnerability, upgrade all affected Github.com/apache/trafficcontrol 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/apache/trafficcontrol fixed: 5.1.3 
Upgrade github.com/apache/trafficcontrol to 5.1.3
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/apache/trafficcontrol

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-42009, inspect your project dependencies for Github.com/apache/trafficcontrol:

inspect dependencies for github.com/apache/trafficcontrol

Analyze the terminal output to locate any version of Github.com/apache/trafficcontrol in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.1.3), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Github.com/apache/trafficcontrol, 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

An authenticated Apache Traffic Control Traffic Ops user with Portal-level privileges can send a request with a specially-crafted email subject to the /deliveryservices/request Traffic Ops endpoint to send an email, from the Traffic Ops server, with an arbitrary body to an arbitrary email address. Apache Traffic Control 5.1.x users should upgrade to 5.1.3 or 6.0.0. 4.1.x users should upgrade to 5.1.3.

CVE-2021-42009 Affected Github.com/apache/trafficcontrol Versions

1 component(s)
Fixed Versions:
5.1.3
Product / Package Ecosystem Affected Versions Fixed Version
github.com/apache/trafficcontrol
golang/github.com/apache/trafficcontrol
Go
< 5.1.3
5.1.3

References

NVD — CVE-2021-42009 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42009
Github.com/apache/trafficcontrol Source Repository REPOSITORY
https://github.com/apache/trafficcontrol
lists.apache.org/thread.html/r78d471... WEB
https://lists.apache.org/thread.html/r78d471d8a4fd268a4c5ae6c47327c09d9d4b4467c31da2c97422febb@%3Cdev.trafficcontrol.apache.org%3E
lists.apache.org/thread.html/r7dfa9a... WEB
https://lists.apache.org/thread.html/r7dfa9a89b39d06caeeeb7b5cdc41b3493a9b86cc6cfa059d3f349d87@%3Cannounce.apache.org%3E
lists.apache.org/thread.html/re384fd... WEB
https://lists.apache.org/thread.html/re384fd0f44c6d230f31376153c6e8b59e4a669f927c1533d06d702af%40%3Cdev.trafficcontrol.apache.org%3E
lists.apache.org/thread.html/rf0481b... WEB
https://lists.apache.org/thread.html/rf0481b9e38ece1ece458d3ce7b2d671df819e3555597f31fc34f084e%40%3Ccommits.trafficcontrol.apache.org%3E
Github.com/apache/trafficcontrol Security Information SECURITY
http://www.openwall.com/lists/oss-security/2021/10/12/1

Frequently Asked Questions

What is CVE-2021-42009?
CVE-2021-42009 is a security vulnerability in Github.com/apache/trafficcontrol involving Email relay in Apache Traffic Control under CWE-20: Improper Input Validation.
Which Github.com/apache/trafficcontrol versions are affected?
Affected versions include releases prior to 5.1.3 across affected packages: github.com/apache/trafficcontrol.
What version fixes CVE-2021-42009?
Upgrading to 5.1.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/apache/trafficcontrol affected?
Yes, github.com/apache/trafficcontrol is affected in releases prior to 5.1.3. Upgrade your dependency to 5.1.3 or later.
What is the CVSS score of CVE-2021-42009?
CVE-2021-42009 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2021-42009?
CVE-2021-42009 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Go dependencies for CVE-2021-42009?
Run the dependency tree command: 'inspect dependencies for github.com/apache/trafficcontrol'. 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-gw97-f6h8-gm94",
  "modified" : "2021-10-20T17:07:20Z",
  "published" : "2021-10-13T18:55:04Z",
  "aliases" : [ "CVE-2021-42009" ],
  "summary" : "Email relay in Apache Traffic Control",
  "details" : "An authenticated Apache Traffic Control Traffic Ops user with Portal-level privileges can send a request with a specially-crafted email subject to the /deliveryservices/request Traffic Ops endpoint to send an email, from the Traffic Ops server, with an arbitrary body to an arbitrary email address. Apache Traffic Control 5.1.x users should upgrade to 5.1.3 or 6.0.0. 4.1.x users should upgrade to 5.1.3.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/apache/trafficcontrol"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-42009"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/trafficcontrol"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/r78d471d8a4fd268a4c5ae6c47327c09d9d4b4467c31da2c97422febb@%3Cdev.trafficcontrol.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/r7dfa9a89b39d06caeeeb7b5cdc41b3493a9b86cc6cfa059d3f349d87@%3Cannounce.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/re384fd0f44c6d230f31376153c6e8b59e4a669f927c1533d06d702af%40%3Cdev.trafficcontrol.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/rf0481b9e38ece1ece458d3ce7b2d671df819e3555597f31fc34f084e%40%3Ccommits.trafficcontrol.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2021/10/12/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-10-13T17:43:05Z",
    "nvd_published_at" : "2021-10-12T08:15:00Z"
  }
}