# [HIGH] Mitigating path traversal vulns in Java with Snyk Code

**Source:** Snyk
**Published:** 2023-03-06
**Article:** https://snyk.io/blog/mitigating-path-traversal-java-snyk-code/

## Threat Profile

Snyk Blog In this article
Written by Brian Vermeer 
March 6, 2023
0 mins read Path traversal is a type of security vulnerability that can occur when a web application or service allows an attacker to access server files or directories that are outside the intended directory structure. This can lead to the unauthorized reading or modification of sensitive data. In the context of file uploads, a path traversal vulnerability can occur when an application fails to properly validate the file path spe…

## Indicators of Compromise (high-fidelity only)

- _No high-fidelity IOCs in the RSS summary._ If the source publishes a technical write-up with defanged IOCs in the body, those would be picked up automatically on the next pipeline run.

## MITRE ATT&CK Techniques

- **T1204.002** — User Execution: Malicious File

## Kill chain phases observed

_(none detected from narrative keywords)_

## Recommended hunts

### Article-specific behavioural hunt — Mitigating path traversal vulns in Java with Snyk Code

`UC_1720_0` · phase: **install** · confidence: **High**

**Splunk SPL (CIM):**
```spl
``` Article-specific bespoke detection — Mitigating path traversal vulns in Java with Snyk Code ```
| tstats `summariesonly` count
    from datamodel=Endpoint.Filesystem
    where Filesystem.action IN ("created","modified")
      AND (Filesystem.file_path="*/etc/passwd*")
    by Filesystem.dest, Filesystem.user, Filesystem.process_name,
       Filesystem.file_path, Filesystem.file_name
| `drop_dm_object_name(Filesystem)`
```

**Defender KQL:**
```kql
// Article-specific bespoke detection — Mitigating path traversal vulns in Java with Snyk Code
// Hunts the actual binaries / paths / commandline fragments named
// in the article instead of a generic technique-class template.

// File-creation events for the named binaries / paths
DeviceFileEvents
| where Timestamp > ago(30d)
| where ActionType in ("FileCreated","FileModified")
| where (FolderPath has_any ("/etc/passwd"))
| project Timestamp, DeviceName, AccountName, FolderPath,
          FileName, ActionType, InitiatingProcessFileName,
          InitiatingProcessCommandLine
| order by Timestamp desc
```


## Why this matters

Severity classified as **HIGH** based on: 1 use case(s) fired, 1 technique(s) inferred. Read the full article for actor attribution, tooling details, and any defanged IOCs in the body that aren't visible in the RSS summary.