Vulnerability-Lookup

CVE-2021-21996 (GCVE-0-2021-21996)

Vulnerability from cvelistv5 – Published: 2021-09-08 00:00 – Updated: 2024-08-03 18:30

Summary

An issue was discovered in SaltStack Salt before 3003.3. A user who has control of the source, and source_hash URLs can gain full file system access as root on a salt minion.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

File traversal attack

Assigner

vmware mitre root

References

8 references

URL	Tags
https://saltproject.io/security_announcements/sal…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://www.debian.org/security/2021/dsa-5011	vendor-advisory
https://lists.debian.org/debian-lts-announce/2021…	mailing-list
https://lists.debian.org/debian-lts-announce/2021…	mailing-list
https://security.gentoo.org/glsa/202310-22	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	Saltstack Salt	Affected: Saltstack Salt (before 3003.3)

Show details on NVD website

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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T16:01:42+00:00",
      "cve": "CVE-2021-21996",
      "id": "CVE-2021-21996",
      "initial_release_date": "2021-09-02T00:00:00+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "salt: user having control of source and source_hash URLs leads to root access",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21996.json",
      "version": "3"
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    "suse_vex": {
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      "current_release_date": "2026-09-03T00:49:11Z",
      "cve": "CVE-2021-21996",
      "id": "CVE-2021-21996",
      "initial_release_date": "2023-02-15T03:46:05Z",
      "product_status:known_affected": "396",
      "product_status:known_not_affected": "108",
      "product_status:recommended": "920",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-21996",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-21996.json",
      "version": "42"
    }
  }
}

SUSE-SU-2021:3550-1

Vulnerability from csaf_suse - Published: 2021-10-27 13:27 - Updated: 2021-10-27 13:27

Summary

Security update for Salt

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2021-21996.

CVE-2021-21996

4.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Recommended: 55 products

Open the full advisory

SUSE-SU-2021:3553-1

Vulnerability from csaf_suse - Published: 2021-10-27 13:28 - Updated: 2021-10-27 13:28

Summary

Security update for Salt

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2021-21996.

CVE-2021-21996

4.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Recommended: 132 products

Open the full advisory

SUSE-SU-2021:3555-1

Vulnerability from csaf_suse - Published: 2021-10-27 13:28 - Updated: 2021-10-27 13:28

Summary

Security update for salt

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2021-21996.

CVE-2021-21996

4.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Recommended: 174 products

Open the full advisory

SUSE-SU-2021:3556-1

Vulnerability from csaf_suse - Published: 2021-10-27 13:29 - Updated: 2021-10-27 13:29

Summary

Security update for salt

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2021-21996.

CVE-2021-21996

4.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Recommended: 59 products

Open the full advisory

SUSE-SU-2021:3557-1

Vulnerability from csaf_suse - Published: 2021-10-27 13:29 - Updated: 2021-10-27 13:29

Summary

Security update for salt

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2021-21996.

CVE-2021-21996

4.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Recommended: 63 products

Open the full advisory

SUSE-SU-2021:3561-1

Vulnerability from csaf_suse - Published: 2021-10-27 13:30 - Updated: 2021-10-27 13:30

Summary

Security update for SUSE Manager Server 4.2

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2021-21996.

CVE-2021-21996

4.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Recommended: 67 products

Open the full advisory

SUSE-SU-2021:3621-1

Vulnerability from csaf_suse - Published: 2021-11-05 16:55 - Updated: 2021-11-05 16:55

Summary

Security update for SUSE Manager Server 4.1

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2021-21996.

CVE-2021-21996

4.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Recommended: 48 products

Open the full advisory

ubuntu-cve-2021-21996

Vulnerability from osv_ubuntu

Published

2021-09-08 15:15

Modified

2026-04-02 04:52

Summary

Details

An issue was discovered in SaltStack Salt before 3003.3. A user who has control of the source, and source_hash URLs can gain full file system access as root on a salt minion.

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-21996	REPORT
	https://saltproject.io/security_announcements/sal…	REPORT
	https://www.cve.org/CVERecord?id=CVE-2021-21996	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "salt-api",
            "binary_version": "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
          },
          {
            "binary_name": "salt-cloud",
            "binary_version": "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
          },
          {
            "binary_name": "salt-common",
            "binary_version": "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
          },
          {
            "binary_name": "salt-master",
            "binary_version": "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
          },
          {
            "binary_name": "salt-minion",
            "binary_version": "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
          },
          {
            "binary_name": "salt-proxy",
            "binary_version": "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
          },
          {
            "binary_name": "salt-ssh",
            "binary_version": "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
          },
          {
            "binary_name": "salt-syndic",
            "binary_version": "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "salt",
        "purl": "pkg:deb/ubuntu/salt@2017.7.4+dfsg1-1ubuntu18.04.2+esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2016.11.5+ds-1",
        "2016.11.8+dfsg1-1",
        "2017.7.2+dfsg1-2ubuntu1",
        "2017.7.3+dfsg1-1",
        "2017.7.4+dfsg1-1",
        "2017.7.4+dfsg1-1ubuntu18.04.1",
        "2017.7.4+dfsg1-1ubuntu18.04.2",
        "2017.7.4+dfsg1-1ubuntu18.04.2+esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in SaltStack Salt before 3003.3. A user who has control of the source, and source_hash URLs can gain full file system access as root on a salt minion.",
  "id": "UBUNTU-CVE-2021-21996",
  "modified": "2026-04-02T04:52:15Z",
  "published": "2021-09-08T15:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-21996"
    },
    {
      "type": "REPORT",
      "url": "https://saltproject.io/security_announcements/salt-security-advisory-2021-sep-02/"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-21996"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-21996"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2021-21996 (GCVE-0-2021-21996)

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature