CVE-2023-23926

APOC (Awesome Procedures on Cypher) is an add-on library for Neo4j. An XML External Entity (XXE) vulnerability found in the apoc.import.graphml procedure of APOC core plugin prior to version 5.5.0 in Neo4j graph database. XML External Entity (XXE) injection occurs when the XML parser allows external entities to be resolved. The XML parser used by the apoc.import.graphml procedure was not configured in a secure way and therefore allowed this. External entities can be used to read local files, send HTTP requests, and perform denial-of-service attacks on the application. Abusing the XXE vulnerability enabled assessors to read local files remotely. Although with the level of privileges assessors had this was limited to one-line files. With the ability to write to the database, any file could have been read. Additionally, assessors noted, with local testing, the server could be crashed by passing in improperly formatted XML. The minimum version containing a patch for this vulnerability is 5.5.0. Those who cannot upgrade the library can control the allowlist of the procedures that can be used in your system.

CVSS v3.0 8.1 HIGH

8.1^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/neo4j/apoc/pull/310	Patch
https://github.com/neo4j/apoc/security/advisories/GHSA-6wxg-wh7f-rqpr	Vendor Advisory
https://github.com/neo4j/apoc/releases/tag/5.5.0	Release Notes
https://neo4j.com/docs/operations-manual/current/reference/configuration-settings/#config_dbms.security.procedures.allowlist	Product

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:a:neo4j:awesome_procedures_on_cyper:*:*:*:*:*:*:*:*

Information

Published : 2023-02-16 08:15

Updated : 2023-02-24 10:26

NVD link : CVE-2023-23926

Mitre link : CVE-2023-23926

JSON object : View

CWE

CWE-611

Improper Restriction of XML External Entity Reference

Advertisement

Products Affected

neo4j

awesome_procedures_on_cyper

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://github.com/neo4j/apoc/pull/310", "name": "https://github.com/neo4j/apoc/pull/310", "tags": ["Patch"], "refsource": "MISC"}, {"url": "https://github.com/neo4j/apoc/security/advisories/GHSA-6wxg-wh7f-rqpr", "name": "https://github.com/neo4j/apoc/security/advisories/GHSA-6wxg-wh7f-rqpr", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://github.com/neo4j/apoc/releases/tag/5.5.0", "name": "https://github.com/neo4j/apoc/releases/tag/5.5.0", "tags": ["Release Notes"], "refsource": "MISC"}, {"url": "https://neo4j.com/docs/operations-manual/current/reference/configuration-settings/#config_dbms.security.procedures.allowlist", "name": "https://neo4j.com/docs/operations-manual/current/reference/configuration-settings/#config_dbms.security.procedures.allowlist", "tags": ["Product"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "APOC (Awesome Procedures on Cypher) is an add-on library for Neo4j. An XML External Entity (XXE) vulnerability found in the apoc.import.graphml procedure of APOC core plugin prior to version 5.5.0 in Neo4j graph database. XML External Entity (XXE) injection occurs when the XML parser allows external entities to be resolved. The XML parser used by the apoc.import.graphml procedure was not configured in a secure way and therefore allowed this. External entities can be used to read local files, send HTTP requests, and perform denial-of-service attacks on the application. Abusing the XXE vulnerability enabled assessors to read local files remotely. Although with the level of privileges assessors had this was limited to one-line files. With the ability to write to the database, any file could have been read. Additionally, assessors noted, with local testing, the server could be crashed by passing in improperly formatted XML. The minimum version containing a patch for this vulnerability is 5.5.0. Those who cannot upgrade the library can control the allowlist of the procedures that can be used in your system."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-611"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2023-23926", "ASSIGNER": "security-advisories@github.com"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}}, "publishedDate": "2023-02-16T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:neo4j:awesome_procedures_on_cyper:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.5.0"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2023-02-24T18:26Z"}