CVE-2021-4024: Github.com/containers/podman/v3 Exposure Of Sensitive Information To Vulnerability

MODERATE
Advisory Identifier: GHSA-3cf2-x423-x582
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CVSS 6.5
CWE-200 CWE-346
Published
Advisory Summary

CVE-2021-4024 is a MODERATE (CVSS 6.5) exposure of sensitive information to vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Github.com/containers/podman/v3 libraries in the Go ecosystem. The issue involves exposure of sensitive information to an unauthorized actor and origin validation error in podman. Remediation is available by upgrading affected packages to version 3.4.3.

CVE-2021-4024 at a Glance

CVE Identifier CVE-2021-4024
GHSA Identifier GHSA-3cf2-x423-x582
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Github.com/containers/podman/v3
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:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L).

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

How to Fix CVE-2021-4024

To remediate this vulnerability, upgrade all affected Github.com/containers/podman/v3 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/containers/podman/v3 fixed: 3.4.3 
Upgrade github.com/containers/podman/v3 to 3.4.3
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/containers/podman/v3

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-4024, inspect your project dependencies for Github.com/containers/podman/v3:

inspect dependencies for github.com/containers/podman/v3

Analyze the terminal output to locate any version of Github.com/containers/podman/v3 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.4.3), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Github.com/containers/podman/v3, 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

A flaw was found in podman. The `podman machine` function (used to create and manage Podman virtual machine containing a Podman process) spawns a `gvproxy` process on the host system. The `gvproxy` API is accessible on port 7777 on all IP addresses on the host. If that port is open on the host's firewall, an attacker can potentially use the `gvproxy` API to forward ports on the host to ports in the VM, making private services on the VM accessible to the network. This issue could be also used to interrupt the host's services by forwarding all ports to the VM.

CVE-2021-4024 Affected Github.com/containers/podman/v3 Versions

1 component(s)
Fixed Versions:
3.4.3
Product / Package Ecosystem Affected Versions Fixed Version
github.com/containers/podman/v3
golang/github.com/containers/podman/v3
Go
< 3.4.3
3.4.3

References

NVD — CVE-2021-4024 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4024
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2026675,
Github.com/containers/podman/v3 Source Repository REPOSITORY
https://github.com/containers/podman
Github.com/containers/podman/v3 Release RELEASE
https://github.com/containers/podman/releases/tag/v3.4.3
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QFFVJ6S3ZRMPDYB7KYAWEMDHXFZYQPU3

Frequently Asked Questions

What is CVE-2021-4024?
CVE-2021-4024 is a security vulnerability in Github.com/containers/podman/v3 involving Exposure of Sensitive Information to an Unauthorized Actor and Origin Validation Error in podman under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Github.com/containers/podman/v3 versions are affected?
Affected versions include releases prior to 3.4.3 across affected packages: github.com/containers/podman/v3.
What version fixes CVE-2021-4024?
Upgrading to 3.4.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/containers/podman/v3 affected?
Yes, github.com/containers/podman/v3 is affected in releases prior to 3.4.3. Upgrade your dependency to 3.4.3 or later.
What is the CVSS score of CVE-2021-4024?
CVE-2021-4024 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
What CWE is associated with CVE-2021-4024?
CVE-2021-4024 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Go dependencies for CVE-2021-4024?
Run the dependency tree command: 'inspect dependencies for github.com/containers/podman/v3'. 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-3cf2-x423-x582",
  "modified" : "2022-02-09T18:28:05Z",
  "published" : "2022-01-06T21:12:50Z",
  "aliases" : [ "CVE-2021-4024" ],
  "summary" : "Exposure of Sensitive Information to an Unauthorized Actor and Origin Validation Error in podman",
  "details" : "A flaw was found in podman. The `podman machine` function (used to create and manage Podman virtual machine containing a Podman process) spawns a `gvproxy` process on the host system. The `gvproxy` API is accessible on port 7777 on all IP addresses on the host. If that port is open on the host's firewall, an attacker can potentially use the `gvproxy` API to forward ports on the host to ports in the VM, making private services on the VM accessible to the network. This issue could be also used to interrupt the host's services by forwarding all ports to the VM.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/containers/podman/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.4.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-4024"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2026675,"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/containers/podman"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/containers/podman/releases/tag/v3.4.3"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QFFVJ6S3ZRMPDYB7KYAWEMDHXFZYQPU3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-346" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-01-05T17:44:04Z",
    "nvd_published_at" : "2021-12-23T20:15:00Z"
  }
}