CVE-2020-15572

View on CVE.org

Published Jul 15, 2020 CVSS 3.1 · 7.5 High EPSS 1.4% KEV · Not listed

Description

Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:torproject:tor::::::::
	cpe:2.3:a:torproject:tor::::::::
	cpe:2.3:a:torproject:tor::::::::
	cpe:2.3:a:torproject:tor:0.4.4.0:alpha::::::
	cpe:2.3:a:torproject:tor:0.4.4.1:alpha::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2020-7559	Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 1.4% (1.404% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes
https://gitlab.torproject.org/tpo/core/tor/-/issues/33119
https://trac.torproject.org/projects/tor/wiki/TROVE

History

No history.

Subscriptions

Torproject Tor

Weaknesses

CWE-125

Sources

CVE record Updated: Aug 4, 2024, 1:22 PM

Status: PUBLISHED
Assigner: mitre
Published: Jul 15, 2020, 4:02 PM
Updated: Aug 4, 2024, 1:22 PM
Reserved: Jul 6, 2020, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 2:56 AM

Status: Modified
Published: Jul 15, 2020, 5:15 PM
Modified: Jun 17, 2026, 2:56 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-07-15T16:02:10.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/33119"}, {"tags": ["x_refsource_MISC"], "url": "https://trac.torproject.org/projects/tor/wiki/TROVE"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2020-15572", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://gitlab.torproject.org/tpo/core/tor/-/issues/33119", "refsource": "MISC", "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/33119"}, {"name": "https://trac.torproject.org/projects/tor/wiki/TROVE", "refsource": "MISC", "url": "https://trac.torproject.org/projects/tor/wiki/TROVE"}, {"name": "https://blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes", "refsource": "CONFIRM", "url": "https://blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T13:22:29.209Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/33119"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://trac.torproject.org/projects/tor/wiki/TROVE"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2020-15572", "datePublished": "2020-07-15T16:02:10.000Z", "dateReserved": "2020-07-06T00:00:00.000Z", "dateUpdated": "2024-08-04T13:22:29.209Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"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": "0DAC8510-95BF-4FF8-9975-86AA5A0417C5", "versionEndExcluding": "0.3.5.11", "vulnerable": true}, {"criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*", "matchCriteriaId": "95D2A6D5-E281-4514-A4BC-74736E93BECD", "versionEndExcluding": "0.4.2.8", "versionStartExcluding": "0.4.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*", "matchCriteriaId": "04AC62C8-A529-439A-8D7D-C79EA9658F76", "versionEndExcluding": "0.4.3.6", "versionStartExcluding": "0.4.3.0", "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}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001."}, {"lang": "es", "value": "Tor versiones anteriores a 0.4.3.6, presenta un acceso de la memoria fuera de l\u00edmites que permite un ataque de denegaci\u00f3n de servicio remoto (bloqueo) contra instancias de Tor creadas para usar Mozilla Network Security Services (NSS), tambi\u00e9n se conoce como TROVE-2020-001"}], "id": "CVE-2020-15572", "lastModified": "2026-06-17T02:56:50.467", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "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": "2020-07-15T17:15:11.283", "references": [{"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/33119"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://trac.torproject.org/projects/tor/wiki/TROVE"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/33119"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://trac.torproject.org/projects/tor/wiki/TROVE"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}