CVE-2019-18466: Github.com/containers/podman/v4 Podman Symlink Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-r34v-gqmw-qvgj
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CVSS 5.5
CWE-59
Published
Advisory Summary

CVE-2019-18466 is a MODERATE (CVSS 5.5) podman symlink vulnerability vulnerability (CWE-59: Improper Link Resolution Before File Access ('Link Following')) affecting Github.com/containers/podman/v4 libraries in the Go ecosystem. The issue involves podman symlink vulnerability. Remediation is available by upgrading affected packages to version 1.6.0.

CVE-2019-18466 at a Glance

CVE Identifier CVE-2019-18466
GHSA Identifier GHSA-r34v-gqmw-qvgj
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-59: Improper Link Resolution Before File Access ('Link Following')
Affected Product Github.com/containers/podman/v4
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 5.5

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

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

How to Fix CVE-2019-18466

To remediate this vulnerability, upgrade all affected Github.com/containers/podman/v4 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/v4 fixed: 1.6.0 
Upgrade github.com/containers/podman/v4 to 1.6.0
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/containers/podman/v4

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-18466, inspect your project dependencies for Github.com/containers/podman/v4:

inspect dependencies for github.com/containers/podman/v4

Analyze the terminal output to locate any version of Github.com/containers/podman/v4 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.6.0), 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-59: Improper Link Resolution Before File Access ('Link Following'), where the product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. In Github.com/containers/podman/v4, 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 issue was discovered in Podman in libpod before 1.6.0. It resolves a symlink in the host context during a copy operation from the container to the host, because an undesired glob operation occurs. An attacker could create a container image containing particular symlinks that, when copied by a victim user to the host filesystem, may overwrite existing files with others from the host.

CVE-2019-18466 Affected Github.com/containers/podman/v4 Versions

1 component(s)
Fixed Versions:
1.6.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/containers/podman/v4
golang/github.com/containers/podman/v4
Go
< 1.6.0
1.6.0

References

NVD — CVE-2019-18466 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18466
Github.com/containers/podman/v4 Source Repository REPOSITORY
https://github.com/containers/libpod/issues/3829
Security Fix Commit FIX COMMIT
https://github.com/containers/libpod/commit/5c09c4d2947a759724f9d5aef6bac04317e03f7e
access.redhat.com/errata/rhsa-2019:42... WEB
https://access.redhat.com/errata/RHSA-2019:4269
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1744588
Github.com/containers/podman/v4 Source Repository REPOSITORY
https://github.com/containers/libpod
Github.com/containers/podman/v4 Source Repository REPOSITORY
https://github.com/containers/libpod/compare/v1.5.1...v1.6.0

Frequently Asked Questions

What is CVE-2019-18466?
CVE-2019-18466 is a security vulnerability in Github.com/containers/podman/v4 involving Podman Symlink Vulnerability under CWE-59: Improper Link Resolution Before File Access ('Link Following').
Which Github.com/containers/podman/v4 versions are affected?
Affected versions include releases prior to 1.6.0 across affected packages: github.com/containers/podman/v4.
What version fixes CVE-2019-18466?
Upgrading to 1.6.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/containers/podman/v4 affected?
Yes, github.com/containers/podman/v4 is affected in releases prior to 1.6.0. Upgrade your dependency to 1.6.0 or later.
What is the CVSS score of CVE-2019-18466?
CVE-2019-18466 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2019-18466?
CVE-2019-18466 is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following') (The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.).
How can I check Go dependencies for CVE-2019-18466?
Run the dependency tree command: 'inspect dependencies for github.com/containers/podman/v4'. 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-r34v-gqmw-qvgj",
  "modified" : "2023-09-26T16:55:36Z",
  "published" : "2022-05-24T16:59:58Z",
  "aliases" : [ "CVE-2019-18466" ],
  "summary" : "Podman Symlink Vulnerability",
  "details" : "An issue was discovered in Podman in libpod before 1.6.0. It resolves a symlink in the host context during a copy operation from the container to the host, because an undesired glob operation occurs. An attacker could create a container image containing particular symlinks that, when copied by a victim user to the host filesystem, may overwrite existing files with others from the host.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/containers/podman/v4"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.6.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-18466"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/containers/libpod/issues/3829"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/containers/libpod/commit/5c09c4d2947a759724f9d5aef6bac04317e03f7e"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2019:4269"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1744588"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/containers/libpod"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/containers/libpod/compare/v1.5.1...v1.6.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-59" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-18T20:43:20Z",
    "nvd_published_at" : "2019-10-28T13:15:00Z"
  }
}