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CVE-2021-25321 (GCVE-0-2021-25321)

Vulnerability from cvelistv5 – Published: 2021-06-30 08:25 – Updated: 2024-09-16 18:43
VLAI
Title
arpwatch: Local privilege escalation from runtime user to root
Summary
A UNIX Symbolic Link (Symlink) Following vulnerability in arpwatch of SUSE Linux Enterprise Server 11-SP4-LTSS, SUSE Manager Server 4.0, SUSE OpenStack Cloud Crowbar 9; openSUSE Factory, Leap 15.2 allows local attackers with control of the runtime user to run arpwatch as to escalate to root upon the next restart of arpwatch. This issue affects: SUSE Linux Enterprise Server 11-SP4-LTSS arpwatch versions prior to 2.1a15. SUSE Manager Server 4.0 arpwatch versions prior to 2.1a15. SUSE OpenStack Cloud Crowbar 9 arpwatch versions prior to 2.1a15. openSUSE Factory arpwatch version 2.1a15-169.5 and prior versions. openSUSE Leap 15.2 arpwatch version 2.1a15-lp152.5.5 and prior versions.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version CPE status
SUSE SUSE Linux Enterprise Server 11-SP4-LTSS Affected: arpwatch , < 2.1a15 (custom)
guessed Create a notification for this product.
SUSE SUSE Manager Server 4.0 Affected: arpwatch , < 2.1a15 (custom)
guessed Create a notification for this product.
SUSE SUSE OpenStack Cloud Crowbar 9 Affected: arpwatch , < 2.1a15 (custom)
guessed Create a notification for this product.
openSUSE Factory Affected: arpwatch , ≤ 2.1a15-169.5 (custom)
guessed Create a notification for this product.
openSUSE Leap 15.2 Affected: arpwatch , ≤ 2.1a15-lp152.5.5 (custom)
guessed Create a notification for this product.
Date Public
2021-06-28 00:00
Credits
Johannes Segitz of SUSE
Show details on NVD website
To clipboard 

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SUSE OpenStack Cloud Crowbar 9 versiones arpwatch anteriores a 2.1a15. openSUSE Factory versi\u00f3n arpwatch 2.1a15-169.5 y versiones anteriores. openSUSE Leap 15.2 versi\u00f3n arpwatch 2.1a15-lp152.5.5 y versiones anteriores\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"meissner@suse.de\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:C/I:C/A:C\",\"baseScore\":7.2,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":3.9,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"meissner@suse.de\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-61\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-Other\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:suse:arpwatch:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"2.1a15\",\"matchCriteriaId\":\"6838A554-093A-4125-BB0A-63BBA1017976\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:a:suse:manager_server:4.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"51136B38-5715-49B3-BD8D-91F90632247D\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:a:suse:openstack_cloud_crowbar:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B631400C-0A5A-45A3-9DFA-B419E83D324E\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:ltss:*:*:*\",\"matchCriteriaId\":\"7B84C8D3-0B59-40DC-881D-D016A422E8CC\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:suse:arpwatch:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.1a15-169.5\",\"matchCriteriaId\":\"928A6B2B-B06B-4E75-8A65-C30A83B26B80\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:a:opensuse:factory:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E29492E1-43D8-43BF-94E3-26A762A66FAA\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:suse:arpwatch:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.1a15-lp152.5.5\",\"matchCriteriaId\":\"F0862012-0FB3-4216-A47B-AFDCA202DE08\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B009C22E-30A4-4288-BCF6-C3E81DEAF45A\"}]}]}],\"references\":[{\"url\":\"https://bugzilla.suse.com/show_bug.cgi?id=1186240\",\"source\":\"meissner@suse.de\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://bugzilla.suse.com/show_bug.cgi?id=1186240\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T16:15:13+00:00",
      "cve": "CVE-2021-25321",
      "id": "CVE-2021-25321",
      "initial_release_date": "2021-06-28T00:00:00+00:00",
      "product_status:known_not_affected": "3",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "arpwatch: Local privilege escalation from runtime user to root",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-25321.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-31T02:06:54Z",
      "cve": "CVE-2021-25321",
      "id": "CVE-2021-25321",
      "initial_release_date": "2023-02-15T03:45:02Z",
      "product_status:known_affected": "1",
      "product_status:recommended": "93",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-25321",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-25321.json",
      "version": "20"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.