CVE-2019-12274: Github.com/rancher/rancher Rancher Privilege Escalation Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-gc62-j469-9gjm
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CVSS 8.8
CWE-668
Published
Advisory Summary

CVE-2019-12274 is a HIGH (CVSS 8.8) rancher privilege escalation vulnerability vulnerability (CWE-668: Exposure of Resource to Wrong Sphere) affecting Github.com/rancher/rancher libraries in the Go ecosystem. The issue involves rancher privilege escalation vulnerability. Remediation is available by upgrading affected packages to version 2.2.4, 1.6.27.

CVE-2019-12274 at a Glance

CVE Identifier CVE-2019-12274
GHSA Identifier GHSA-gc62-j469-9gjm
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-668: Exposure of Resource to Wrong Sphere
Affected Product Github.com/rancher/rancher
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2019-12274

To remediate this vulnerability, upgrade all affected Github.com/rancher/rancher 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/rancher/rancher fixed: 2.2.4 
Upgrade github.com/rancher/rancher to 2.2.4
github.com/rancher/rancher fixed: 1.6.27 
Upgrade github.com/rancher/rancher to 1.6.27
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/rancher/rancher

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-12274, inspect your project dependencies for Github.com/rancher/rancher:

inspect dependencies for github.com/rancher/rancher

Analyze the terminal output to locate any version of Github.com/rancher/rancher in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.2.4), 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-668: Exposure of Resource to Wrong Sphere, where the product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. In Github.com/rancher/rancher, 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

In Rancher 1 and 2 through 2.2.3, unprivileged users (if allowed to deploy nodes) can gain admin access to the Rancher management plane because node driver options intentionally allow posting certain data to the cloud. The problem is that a user could choose to post a sensitive file such as /root/.kube/config or /var/lib/rancher/management-state/cred/kubeconfig-system.yaml.

CVE-2019-12274 Affected Github.com/rancher/rancher Versions

2 component(s)
Fixed Versions:
2.2.41.6.27
Product / Package Ecosystem Affected Versions Fixed Version
github.com/rancher/rancher
golang/github.com/rancher/rancher
Go
≥ 2.0.0
< 2.2.4
2.2.4
github.com/rancher/rancher
golang/github.com/rancher/rancher
Go
< 1.6.27
1.6.27

References

NVD — CVE-2019-12274 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-12274
forums.rancher.com/t/rancher-release-v... WEB
https://forums.rancher.com/t/rancher-release-v2-2-4-addresses-rancher-cve-2019-12274-and-cve-2019-12303/14466

Frequently Asked Questions

What is CVE-2019-12274?
CVE-2019-12274 is a security vulnerability in Github.com/rancher/rancher involving Rancher Privilege Escalation Vulnerability under CWE-668: Exposure of Resource to Wrong Sphere.
Which Github.com/rancher/rancher versions are affected?
Affected versions include releases prior to 2.2.4, 1.6.27 across affected packages: github.com/rancher/rancher.
What version fixes CVE-2019-12274?
Upgrading to 2.2.4, 1.6.27 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/rancher/rancher affected?
Yes, github.com/rancher/rancher is affected in releases prior to 2.2.4, 1.6.27. Upgrade your dependency to 2.2.4, 1.6.27 or later.
What is the CVSS score of CVE-2019-12274?
CVE-2019-12274 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-12274?
CVE-2019-12274 is classified under CWE-668: Exposure of Resource to Wrong Sphere (The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.).
How can I check Go dependencies for CVE-2019-12274?
Run the dependency tree command: 'inspect dependencies for github.com/rancher/rancher'. 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-gc62-j469-9gjm",
  "modified" : "2023-08-01T23:31:39Z",
  "published" : "2022-05-24T16:47:29Z",
  "aliases" : [ "CVE-2019-12274" ],
  "summary" : "Rancher Privilege Escalation Vulnerability",
  "details" : "In Rancher 1 and 2 through 2.2.3, unprivileged users (if allowed to deploy nodes) can gain admin access to the Rancher management plane because node driver options intentionally allow posting certain data to the cloud. The problem is that a user could choose to post a sensitive file such as /root/.kube/config or /var/lib/rancher/management-state/cred/kubeconfig-system.yaml.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/rancher/rancher"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.2.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/rancher/rancher"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.6.27"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-12274"
  }, {
    "type" : "WEB",
    "url" : "https://forums.rancher.com/t/rancher-release-v2-2-4-addresses-rancher-cve-2019-12274-and-cve-2019-12303/14466"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-668" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-01T23:31:39Z",
    "nvd_published_at" : "2019-06-06T16:29:00Z"
  }
}