CVE-2021-34548

An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-003. An attacker can forge RELAY_END or RELAY_RESOLVED to bypass the intended access control for ending a stream.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
http://packetstormsecurity.com/files/163510/Tor-Half-Closed-Connection-Stream-Confusion.html	Third Party Advisory VDB Entry
https://blog.torproject.org/node/2041	Release Notes Vendor Advisory
https://gitlab.torproject.org/tpo/core/tor/-/issues/40389	Broken Link
https://security.gentoo.org/glsa/202107-25	Third Party Advisory

Configurations

Configuration 1 (hide)

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::::::::

History

No history.

Information

Published : 2021-06-29 11:15

Updated : 2023-08-08 14:21

NVD link : CVE-2021-34548

Mitre link : CVE-2021-34548

CVE.ORG link : CVE-2021-34548

JSON object : View

Products Affected

torproject

tor

CWE

CWE-290

Authentication Bypass by Spoofing

{"id": "CVE-2021-34548", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2021-06-29T11:15:07.883", "references": [{"url": "http://packetstormsecurity.com/files/163510/Tor-Half-Closed-Connection-Stream-Confusion.html", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "https://blog.torproject.org/node/2041", "tags": ["Release Notes", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://gitlab.torproject.org/tpo/core/tor/-/issues/40389", "tags": ["Broken Link"], "source": "cve@mitre.org"}, {"url": "https://security.gentoo.org/glsa/202107-25", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-290"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-003. An attacker can forge RELAY_END or RELAY_RESOLVED to bypass the intended access control for ending a stream."}, {"lang": "es", "value": "Se ha detectado un problema en Tor versiones anteriores a 0.4.6.5, tambi\u00e9n se conoce como TROVE-2021-003. Un atacante puede falsificar las funciones RELAY_END o RELAY_RESOLVED para omitir el control de acceso previsto para terminar un flujo"}], "lastModified": "2023-08-08T14:21:49.707", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C2666B22-DC07-4BFA-A756-3DC4E970EBDD", "versionEndExcluding": "0.3.5.15"}, {"criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "072B35B0-7EBF-4652-BB89-12B4BEC9A8EF", "versionEndExcluding": "0.4.4.9", "versionStartIncluding": "0.4.0.0"}, {"criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "57ED9234-622B-4B0D-8E29-2851A87DE0D1", "versionEndExcluding": "0.4.5.9", "versionStartIncluding": "0.4.5.0"}, {"criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EFD89230-DBEF-4134-9C42-8187CE542B7C", "versionEndExcluding": "0.4.6.5", "versionStartIncluding": "0.4.6.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}