CVE-2023-23926 XML External Entity (XXE) vulnerability in apoc.import.graphml
Attackers can exploit an XML External Entity vulnerability in the Neo4j APOC plugin to read local files and cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-23926?
CVE-2023-23926 is a medium-severity vulnerability in neo4j apoc, published on 16 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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 and 4.4.0.14 (4.4 branch) 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.
Weakness: CWE-611
Which versions are affected by CVE-2023-23926?
4 open source packages ship an affected version, including org.neo4j.procedure:apoc-core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.neo4j.procedure:apoc-core Maven | All versions | 4.4.0.14 |
org.neo4j.procedure:apoc-core Maven | All versions | 4.4.0.14 |
org.neo4j.procedure:apoc-core Maven | From 5.0.0 | 5.5.0 |
org.neo4j.procedure:apoc-core Maven | From 5.0.0 | 5.5.0 |
Products include Neo4j Awesome Procedures on Cyper.
How do I fix CVE-2023-23926?
Upgrade org.neo4j.procedure:apoc-core to a fixed version for your release line: 4.4.0.14 or 5.5.0.
Is CVE-2023-23926 being exploited?
There is no known exploitation of CVE-2023-23926 in the wild and no public exploit code.
Other vulnerabilities in neo4j apoc
Sources
Also known as GHSA-6wxg-wh7f-rqpr.