Vulnerability-Lookup

CVE-2021-28089 (GCVE-0-2021-28089)

Vulnerability from cvelistv5 – Published: 2021-03-19 04:18 – Updated: 2024-08-03 21:33

Summary

Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.

Severity

7.5 (High)


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

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
https://gitlab.torproject.org/tpo/core/tor/-/issu…	x_refsource_MISC
https://blog.torproject.org/node/2009	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202107-25	vendor-advisoryx_refsource_GENTOO

Show details on NVD website

JSON

To clipboard

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    "redhat_vex": {
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      "cve": "CVE-2021-28089",
      "id": "CVE-2021-28089",
      "initial_release_date": "2021-03-16T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "tor: dump_desc function was called incorrectly in several places in a way that could lead to excessive CPU usage",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-28089.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2025-03-15T09:04:05Z",
      "cve": "CVE-2021-28089",
      "id": "CVE-2021-28089",
      "initial_release_date": "2023-02-15T03:44:16Z",
      "product_status:recommended": "3",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-28089",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-28089.json",
      "version": "6"
    }
  }
}

BDU:2021-01909 (CVE-2021-28089)

Vulnerability from fstec – Published: 2021-04-06 – Updated: 2021-04-06 – View on bdu.fstec.ru Exploit publicly available Fixed

Title

Уязвимость функции dump_desc() браузера Tor, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость функции dump_desc() браузера Tor связана с ошибкой механизма контроля расходуемых ресурсов. Эксплуатация уязвимости позволяет нарушителю, действующему удаленно, вызвать отказ в обслуживании

Severity

5.0 (Medium) CVSS 2.0


                      
                        AV:N/AC:L/Au:N/C:N/I:N/A:P

7.5 (High) CVSS 3.0


                      
                        CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Resource exhaustion

Incidents

Being clarified

Remediation

Software update

CWE

CWE-400 - Неконтролируемый расход ресурса («Истощение ресурса»)

Aliases

CVE-2021-28089

References

6 references

URL
https://blog.torproject.org/node/2009
https://gitlab.torproject.org/tpo/core/tor/-/issues/40286
https://gitlab.torproject.org/tpo/core/tor/-/issues/40304
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproj…
https://nvd.nist.gov/vuln/detail/CVE-2021-28089
https://security-tracker.debian.org/tracker/CVE-2021-28089

Impacted products

3 products from 4 vendors

Vendors

Сообщество свободного программного обеспечения, Fedora Project, The Tor Project, Inc.

Products

Debian GNU/Linux, Fedora, Tor

Versions

9 (Debian GNU/Linux), 10 (Debian GNU/Linux), 33 (Fedora), до 0.3.5.14 (Tor), от 0.4.4.0 до 0.4.4.8 (Tor), от 0.4.5.0 до 0.4.5.7 (Tor)

Product types

Operating system, Network software

Platforms

Сообщество свободного программного обеспечения Debian GNU/Linux 9, Сообщество свободного программного обеспечения Debian GNU/Linux 10, Fedora Project Fedora 33

Mitigations

Использование рекомендаций: Для Tor: Обновление программного обеспечения до 0.4.5.7-1 или более поздней версии Для Debian: Обновление программного обеспечения (пакета tor) до 0.3.5.14-1 или более поздней версии Для Fedora: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
  "CVSS 3.0": "AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "\u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f, Fedora Project, The Tor Project, Inc.",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "9 (Debian GNU/Linux), 10 (Debian GNU/Linux), 33 (Fedora), \u0434\u043e 0.3.5.14 (Tor), \u043e\u0442 0.4.4.0 \u0434\u043e 0.4.4.8 (Tor), \u043e\u0442 0.4.5.0 \u0434\u043e 0.4.5.7 (Tor)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\n\u0414\u043b\u044f Tor:\n\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u0434\u043e 0.4.5.7-1 \u0438\u043b\u0438 \u0431\u043e\u043b\u0435\u0435 \u043f\u043e\u0437\u0434\u043d\u0435\u0439 \u0432\u0435\u0440\u0441\u0438\u0438\n\n\u0414\u043b\u044f Debian:\n\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f (\u043f\u0430\u043a\u0435\u0442\u0430 tor) \u0434\u043e 0.3.5.14-1 \u0438\u043b\u0438 \u0431\u043e\u043b\u0435\u0435 \u043f\u043e\u0437\u0434\u043d\u0435\u0439 \u0432\u0435\u0440\u0441\u0438\u0438\n\n\u0414\u043b\u044f Fedora:\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "10.02.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "06.04.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "06.04.2021",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2021-01909",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2021-28089",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Debian GNU/Linux, Fedora, Tor",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "\u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Debian GNU/Linux 9 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Debian GNU/Linux 10 , Fedora Project Fedora 33 ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 dump_desc() \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 Tor, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u0440\u0430\u0441\u0445\u043e\u0434 \u0440\u0435\u0441\u0443\u0440\u0441\u0430 (\u00ab\u0418\u0441\u0442\u043e\u0449\u0435\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u00bb) (CWE-400)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 dump_desc() \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 Tor \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044f \u0440\u0430\u0441\u0445\u043e\u0434\u0443\u0435\u043c\u044b\u0445 \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u0418\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://blog.torproject.org/node/2009\nhttps://gitlab.torproject.org/tpo/core/tor/-/issues/40286\nhttps://gitlab.torproject.org/tpo/core/tor/-/issues/40304\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-28089\nhttps://security-tracker.debian.org/tracker/CVE-2021-28089",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430, \u0421\u0435\u0442\u0435\u0432\u043e\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-400",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,5)"
}

FKIE_CVE-2021-28089

Vulnerability from fkie_nvd - Published: 2021-03-19 05:15 - Updated: 2026-06-17 03:45

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.

References

URL	Tags
cve@mitre.org	https://blog.torproject.org/node/2009	Release Notes, Vendor Advisory
cve@mitre.org	https://gitlab.torproject.org/tpo/core/tor/-/issues/40304	Vendor Advisory
cve@mitre.org	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/
cve@mitre.org	https://security.gentoo.org/glsa/202107-25	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://blog.torproject.org/node/2009	Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://gitlab.torproject.org/tpo/core/tor/-/issues/40304	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/
af854a3a-2127-422b-91ae-364da2661108	https://security.gentoo.org/glsa/202107-25	Third Party Advisory

Impacted products

Vendor	Product	Version
torproject	tor	*
torproject	tor	*
torproject	tor	*
torproject	tor	0.4.4.0
torproject	tor	0.4.4.1
torproject	tor	0.4.4.2
torproject	tor	0.4.4.3
fedoraproject	fedora	33

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "43571CF8-3E89-4207-85A4-809927C4E8B1",
              "versionEndExcluding": "0.3.5.14",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "172491E9-1095-4908-8D59-F65C7639FDAF",
              "versionEndExcluding": "0.4.4.8",
              "versionStartIncluding": "0.4.4.4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A7449C9D-05ED-49E4-A3D9-674B44E032F9",
              "versionEndExcluding": "0.4.5.7",
              "versionStartIncluding": "0.4.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:torproject:tor:0.4.4.0:alpha:*:*:*:*:*:*",
              "matchCriteriaId": "C3708B4D-8F02-47B4-81E8-AA626B04C906",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:torproject:tor:0.4.4.1:alpha:*:*:*:*:*:*",
              "matchCriteriaId": "2143F2C0-BBD4-4B14-84D6-70125DD37376",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:torproject:tor:0.4.4.2:alpha:*:*:*:*:*:*",
              "matchCriteriaId": "85811EFA-8639-439D-BC97-52C70D5937E1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:torproject:tor:0.4.4.3:alpha:*:*:*:*:*:*",
              "matchCriteriaId": "419573B8-18FB-4BEA-8C21-023BA05B3D8E",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001."
    },
    {
      "lang": "es",
      "value": "Tor versiones anteriores a 0.4.5.7, permite a un participante remoto en el protocolo de directorio de Tor agotar los recursos de la CPU en un objetivo, tambi\u00e9n se conoce como TROVE-2021-001"
    }
  ],
  "id": "CVE-2021-28089",
  "lastModified": "2026-06-17T03:45:47.593",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-03-19T05:15:12.807",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://blog.torproject.org/node/2009"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/40304"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.gentoo.org/glsa/202107-25"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://blog.torproject.org/node/2009"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/40304"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.gentoo.org/glsa/202107-25"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-4457-RX56-P82R

Vulnerability from github – Published: 2022-05-24 17:44 – Updated: 2022-05-24 17:44

Details

Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-28089"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-03-19T05:15:00Z",
    "severity": "HIGH"
  },
  "details": "Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.",
  "id": "GHSA-4457-rx56-p82r",
  "modified": "2022-05-24T17:44:56Z",
  "published": "2022-05-24T17:44:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28089"
    },
    {
      "type": "WEB",
      "url": "https://blog.torproject.org/node/2009"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/40304"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202107-25"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-28089

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.

Aliases

CVE-2021-28089

Aliases

CVE-2021-28089

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-28089",
    "description": "Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.",
    "id": "GSD-2021-28089",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-28089.html",
      "https://www.debian.org/security/2021/dsa-4871",
      "https://advisories.mageia.org/CVE-2021-28089.html",
      "https://security.archlinux.org/CVE-2021-28089",
      "https://ubuntu.com/security/CVE-2021-28089"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-28089"
      ],
      "details": "Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.",
      "id": "GSD-2021-28089",
      "modified": "2023-12-13T01:23:28.756166Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2021-28089",
        "STATE": "PUBLIC"
      },
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                "product_data": [
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          },
          {
            "name": "GLSA-202107-25",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202107-25"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
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              {
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                "cpe_name": [],
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              },
              {
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              {
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              },
              {
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                "cpe_name": [],
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              {
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              {
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                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
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                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
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        "description": {
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        "references": {
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              "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/40304"
            },
            {
              "name": "https://blog.torproject.org/node/2009",
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              "tags": [
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            },
            {
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              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/"
            },
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              "name": "GLSA-202107-25",
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              "tags": [
                "Third Party Advisory"
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              "url": "https://security.gentoo.org/glsa/202107-25"
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      },
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          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-05-16T21:06Z",
      "publishedDate": "2021-03-19T05:15Z"
    }
  }
}

OPENSUSE-SU-2021:0461-1

Vulnerability from csaf_opensuse - Published: 2021-03-21 23:09 - Updated: 2021-03-21 23:09

Summary

Security update for tor

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2021-28089.

CVE-2021-28089

7.5 (High)


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

Recommended: 1 product

Open the full advisory

OPENSUSE-SU-2021:0474-1

Vulnerability from csaf_opensuse - Published: 2021-03-25 11:07 - Updated: 2021-03-25 11:07

Summary

Security update for tor

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2021-28089.

CVE-2021-28089

7.5 (High)


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

Recommended: 4 products

Open the full advisory

OPENSUSE-SU-2024:11469-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2024-06-15 00:00

Summary

tor-0.4.6.7-2.2 on GA media

Severity

Moderate

Scope

22 vulnerabilities in this advisory, including CVE-2021-28089.

CVE-2021-28089

7.5 (High)


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

Recommended: 4 products

Open the full advisory

ubuntu-cve-2021-28089

Vulnerability from osv_ubuntu

Published

2021-03-19 05:15

Modified

2025-09-08 16:47

Summary

Details

Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.

Severity

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-28089	REPORT
	https://blog.torproject.org/node/2009	REPORT
	https://bugs.torproject.org/tpo/core/tor/40286	REPORT
	https://gitlab.torproject.org/tpo/core/tor/-/comm…	REPORT
	https://ubuntu.com/security/notices/USN-5036-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-28089	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "tor",
            "binary_version": "0.2.9.14-1ubuntu1~16.04.3+esm1"
          },
          {
            "binary_name": "tor-geoipdb",
            "binary_version": "0.2.9.14-1ubuntu1~16.04.3+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "tor",
        "purl": "pkg:deb/ubuntu/tor@0.2.9.14-1ubuntu1~16.04.3+esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.9.14-1ubuntu1~16.04.3+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.2.6.10-1ubuntu2",
        "0.2.7.6-1ubuntu1",
        "0.2.9.11-1ubuntu1~16.04.1",
        "0.2.9.14-1ubuntu1~16.04.1",
        "0.2.9.14-1ubuntu1~16.04.2",
        "0.2.9.14-1ubuntu1~16.04.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "tor",
            "binary_version": "0.3.2.10-1ubuntu0.2~esm2"
          },
          {
            "binary_name": "tor-geoipdb",
            "binary_version": "0.3.2.10-1ubuntu0.2~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "tor",
        "purl": "pkg:deb/ubuntu/tor@0.3.2.10-1ubuntu0.2~esm2?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.2.10-1ubuntu0.2~esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.3.0.10-1",
        "0.3.1.8-2",
        "0.3.1.9-1",
        "0.3.2.9-1",
        "0.3.2.9-1build1",
        "0.3.2.10-1",
        "0.3.2.10-1ubuntu0.1",
        "0.3.2.10-1ubuntu0.2~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "tor",
            "binary_version": "0.4.2.7-1ubuntu0.1~esm1"
          },
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          }
        ]
      },
      "package": {
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        "name": "tor",
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      },
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        {
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            {
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            },
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          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "0.4.1.5-1build1",
        "0.4.1.6-1",
        "0.4.2.5-1",
        "0.4.2.6-1",
        "0.4.2.7-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.",
  "id": "UBUNTU-CVE-2021-28089",
  "modified": "2025-09-08T16:47:03Z",
  "published": "2021-03-19T05:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28089"
    },
    {
      "type": "REPORT",
      "url": "https://blog.torproject.org/node/2009"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.torproject.org/tpo/core/tor/40286"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.torproject.org/tpo/core/tor/-/commit/ede88c374cd61e1e362422718625707a770cffff"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5036-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-28089"
    }
  ],
  "related": [
    "USN-5036-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-28089"
  ]
}

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2021-28089 (GCVE-0-2021-28089)

BDU:2021-01909 (CVE-2021-28089)

FKIE_CVE-2021-28089

GHSA-4457-RX56-P82R

GSD-2021-28089

OPENSUSE-SU-2021:0461-1

OPENSUSE-SU-2021:0474-1

OPENSUSE-SU-2024:11469-1

ubuntu-cve-2021-28089

Vulnerability from osv_ubuntu

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Related by attack behaviour