CVE-2020-17522: Github.com/apache/trafficcontrol Cache Manipulation Attack Vulnerability

MODERATE
Advisory Identifier: GHSA-pw59-4qgf-jxr8
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CVSS 5.8
CWE-732 CWE-525
Published
Advisory Summary

CVE-2020-17522 is a MODERATE (CVSS 5.8) cache manipulation attack vulnerability (CWE-732: Incorrect Permission Assignment for Critical Resource) affecting Github.com/apache/trafficcontrol libraries in the Go ecosystem. The issue involves cache manipulation attack in apache traffic control. Remediation is available by upgrading affected packages to version 5.0.0.

CVE-2020-17522 at a Glance

CVE Identifier CVE-2020-17522
GHSA Identifier GHSA-pw59-4qgf-jxr8
Severity MODERATE
CVSS v3.1 Base Score 5.8
CWE Classification CWE-732: Incorrect Permission Assignment for Critical Resource
Affected Product Github.com/apache/trafficcontrol
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 5.8

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

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

How to Fix CVE-2020-17522

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: 5.0.0 
Upgrade github.com/apache/trafficcontrol to 5.0.0
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-2020-17522, 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 5.0.0), 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-732: Incorrect Permission Assignment for Critical Resource, where the product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. 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

When ORT (now via atstccfg) generates ip_allow.config files in Apache Traffic Control 3.0.0 to 3.1.0 and 4.0.0 to 4.1.0, those files include permissions that allow bad actors to push arbitrary content into and remove arbitrary content from CDN cache servers. Additionally, these permissions are potentially extended to IP addresses outside the desired range, resulting in them being granted to clients possibly outside the CDN arcitechture.

CVE-2020-17522 Affected Github.com/apache/trafficcontrol Versions

1 component(s)
Fixed Versions:
5.0.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/apache/trafficcontrol
golang/github.com/apache/trafficcontrol
Go
< 5.0.0
5.0.0

References

NVD — CVE-2020-17522 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-17522
Security Fix Commit FIX COMMIT
https://github.com/apache/trafficcontrol/commit/492290d810e9608afb5d265b98cd3f3e153e776b
Github.com/apache/trafficcontrol Source Repository REPOSITORY
https://github.com/apache/trafficcontrol
lists.apache.org/thread.html/r3c6750... WEB
https://lists.apache.org/thread.html/r3c675031ac220b5eae64a9c84a03ee60045c6045738607dca4a96cb8@%3Ccommits.trafficcontrol.apache.org%3E
lists.apache.org/thread.html/r3de212... WEB
https://lists.apache.org/thread.html/r3de212a3da73bcf98fa2db7eafb75b2eb8e131ff466e6efc4284df09%40%3Cdev.trafficcontrol.apache.org%3E
lists.apache.org/thread.html/rc8bfd7... WEB
https://lists.apache.org/thread.html/rc8bfd7d4f71d61e9193efcd4699eccbab3c202ec1d75ed9d502f08bf@%3Ccommits.trafficcontrol.apache.org%3E

Frequently Asked Questions

What is CVE-2020-17522?
CVE-2020-17522 is a security vulnerability in Github.com/apache/trafficcontrol involving Cache Manipulation Attack in Apache Traffic Control under CWE-732: Incorrect Permission Assignment for Critical Resource.
Which Github.com/apache/trafficcontrol versions are affected?
Affected versions include releases prior to 5.0.0 across affected packages: github.com/apache/trafficcontrol.
What version fixes CVE-2020-17522?
Upgrading to 5.0.0 (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 5.0.0. Upgrade your dependency to 5.0.0 or later.
What is the CVSS score of CVE-2020-17522?
CVE-2020-17522 has a CVSS v3.1 base score of 5.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
What CWE is associated with CVE-2020-17522?
CVE-2020-17522 is classified under CWE-732: Incorrect Permission Assignment for Critical Resource (The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.).
How can I check Go dependencies for CVE-2020-17522?
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-pw59-4qgf-jxr8",
  "modified" : "2022-04-04T21:27:42Z",
  "published" : "2021-06-18T22:04:32Z",
  "aliases" : [ "CVE-2020-17522" ],
  "summary" : "Cache Manipulation Attack in Apache Traffic Control",
  "details" : "When ORT (now via atstccfg) generates ip_allow.config files in Apache Traffic Control 3.0.0 to 3.1.0 and 4.0.0 to 4.1.0, those files include permissions that allow bad actors to push arbitrary content into and remove arbitrary content from CDN cache servers. Additionally, these permissions are potentially extended to IP addresses outside the desired range, resulting in them being granted to clients possibly outside the CDN arcitechture.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/apache/trafficcontrol"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-17522"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/trafficcontrol/commit/492290d810e9608afb5d265b98cd3f3e153e776b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/trafficcontrol"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/r3c675031ac220b5eae64a9c84a03ee60045c6045738607dca4a96cb8@%3Ccommits.trafficcontrol.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/r3de212a3da73bcf98fa2db7eafb75b2eb8e131ff466e6efc4284df09%40%3Cdev.trafficcontrol.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/rc8bfd7d4f71d61e9193efcd4699eccbab3c202ec1d75ed9d502f08bf@%3Ccommits.trafficcontrol.apache.org%3E"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-525", "CWE-732" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-04-04T21:27:42Z",
    "nvd_published_at" : "2021-01-26T18:15:00Z"
  }
}