CVE-2017-8823

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, there is a use-after-free in onion service v2 during intro-point expiration because the expiring list is mismanaged in certain error cases, aka TROVE-2017-013.

CVSS v3.0 8.1 HIGH
CVSS v2.0 6.8 MEDIUM

8.1^/10

CVSS v3.0 : HIGH

V3 Legend

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://bugs.torproject.org/24430	Vendor Advisory
https://bugs.torproject.org/24313	Issue Tracking Vendor Advisory
https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516	Vendor Advisory
https://www.debian.org/security/2017/dsa-4054	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:tor_project:tor::::::::
	cpe:2.3:a:tor_project:tor::::::::
	cpe:2.3:a:tor_project:tor::::::::
	cpe:2.3:a:tor_project:tor::::::::
	cpe:2.3:a:tor_project:tor::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*

Information

Published : 2017-12-02 23:29

Updated : 2017-12-21 10:01

NVD link : CVE-2017-8823

Mitre link : CVE-2017-8823

JSON object : View

CWE

CWE-416

Use After Free

Products Affected

debian

debian_linux

tor_project

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://bugs.torproject.org/24430", "name": "https://bugs.torproject.org/24430", "tags": ["Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "https://bugs.torproject.org/24313", "name": "https://bugs.torproject.org/24313", "tags": ["Issue Tracking", "Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516", "name": "https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516", "tags": ["Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "https://www.debian.org/security/2017/dsa-4054", "name": "DSA-4054", "tags": ["Third Party Advisory"], "refsource": "DEBIAN"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, there is a use-after-free in onion service v2 during intro-point expiration because the expiring list is mismanaged in certain error cases, aka TROVE-2017-013."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-416"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2017-8823", "ASSIGNER": "security@debian.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.2}}, "publishedDate": "2017-12-03T07:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "0.2.8.17", "versionStartIncluding": "0.2.6"}, {"cpe23Uri": "cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "0.3.1.9", "versionStartIncluding": "0.3.1"}, {"cpe23Uri": "cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "0.3.0.13", "versionStartIncluding": "0.3.0"}, {"cpe23Uri": "cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "0.2.9.14", "versionStartIncluding": "0.2.9"}, {"cpe23Uri": "cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "0.2.5.16"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2017-12-21T18:01Z"}

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