CVE-2018-12021: Github.com/hpcng/singularity Singularity Incorrect Access Control Vulnerability

MODERATE
Advisory Identifier: GHSA-4x32-h296-rg6j
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CVSS 6.5
CWE-200
Published
Advisory Summary

CVE-2018-12021 is a MODERATE (CVSS 6.5) singularity incorrect access control vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Github.com/hpcng/singularity libraries in the Go ecosystem. The issue involves singularity incorrect access control. Remediation is available by upgrading affected packages to version 2.5.2.

CVE-2018-12021 at a Glance

CVE Identifier CVE-2018-12021
GHSA Identifier GHSA-4x32-h296-rg6j
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/hpcng/singularity
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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2018-12021

To remediate this vulnerability, upgrade all affected Github.com/hpcng/singularity 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/hpcng/singularity fixed: 2.5.2 
Upgrade github.com/hpcng/singularity to 2.5.2
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/hpcng/singularity

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-12021, inspect your project dependencies for Github.com/hpcng/singularity:

inspect dependencies for github.com/hpcng/singularity

Analyze the terminal output to locate any version of Github.com/hpcng/singularity in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.5.2), 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/hpcng/singularity, 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

Singularity 2.3.0 through 2.5.1 is affected by an incorrect access control on systems supporting overlay file system. When using the overlay option, a malicious user may access sensitive information by exploiting a few specific Singularity features.

CVE-2018-12021 Affected Github.com/hpcng/singularity Versions

1 component(s)
Fixed Versions:
2.5.2
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hpcng/singularity
golang/github.com/hpcng/singularity
Go
≥ 2.3.0
< 2.5.2
2.5.2

References

NVD — CVE-2018-12021 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-12021
Github.com/hpcng/singularity Source Repository REPOSITORY
https://github.com/singularityware/singularity
Github.com/hpcng/singularity Release RELEASE
https://github.com/singularityware/singularity/releases/tag/2.5.2
Github.com/hpcng/singularity Security Information SECURITY
http://www.openwall.com/lists/oss-security/2019/05/16/1

Frequently Asked Questions

What is CVE-2018-12021?
CVE-2018-12021 is a security vulnerability in Github.com/hpcng/singularity involving Singularity Incorrect Access Control under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Github.com/hpcng/singularity versions are affected?
Affected versions include releases prior to 2.5.2 across affected packages: github.com/hpcng/singularity.
What version fixes CVE-2018-12021?
Upgrading to 2.5.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/hpcng/singularity affected?
Yes, github.com/hpcng/singularity is affected in releases prior to 2.5.2. Upgrade your dependency to 2.5.2 or later.
What is the CVSS score of CVE-2018-12021?
CVE-2018-12021 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2018-12021?
CVE-2018-12021 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-2018-12021?
Run the dependency tree command: 'inspect dependencies for github.com/hpcng/singularity'. 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-4x32-h296-rg6j",
  "modified" : "2023-10-06T15:25:56Z",
  "published" : "2022-05-14T01:01:38Z",
  "aliases" : [ "CVE-2018-12021" ],
  "summary" : "Singularity Incorrect Access Control ",
  "details" : "Singularity 2.3.0 through 2.5.1 is affected by an incorrect access control on systems supporting overlay file system. When using the overlay option, a malicious user may access sensitive information by exploiting a few specific Singularity features.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hpcng/singularity"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.3.0"
      }, {
        "fixed" : "2.5.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.5.1"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-12021"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/singularityware/singularity"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/singularityware/singularity/releases/tag/2.5.2"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2019/05/16/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-22T00:00:49Z",
    "nvd_published_at" : "2018-07-05T18:29:00Z"
  }
}