# [HIGH] A Denial of Service vulnerability discovered in the Axios JavaScript package - affecting all versions of the popular HTTP client

**Source:** Snyk
**Published:** 2019-05-06
**Article:** https://snyk.io/blog/a-denial-of-service-vulnerability-discovered-in-the-axios-javascript-package-affecting-all-versions-of-the-popular-http-client/

## Threat Profile

Snyk Blog In this article
Written by Liran Tal 
May 6, 2019
0 mins read axios is a popular promise-based modern JavaScript HTTP client which is commonly used for browser and Node.js server projects, receiving more than 3 million weekly downloads from npm.
Snyk logged a Denial of Service medium severity (5.3 CVSS) security vulnerability affecting axios, which was discussed and shared as early as 2017 by developer Jeremy Apthorp in the project’s GitHub issue queue.
Affected versions of axios are v…

## 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 — A Denial of Service vulnerability discovered in the Axios JavaScript package - a

`UC_3217_0` · phase: **exploit** · confidence: **High**

**Splunk SPL (CIM):**
```spl
``` Article-specific bespoke detection — A Denial of Service vulnerability discovered in the Axios JavaScript package - a ```
| tstats `summariesonly` count earliest(_time) AS firstTime latest(_time) AS lastTime
    from datamodel=Endpoint.Processes
    where (Processes.process_name IN ("node.js"))
    by Processes.dest, Processes.user, Processes.process_name,
       Processes.process, Processes.parent_process_name, Processes.process_path
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| append [
| tstats `summariesonly` count
    from datamodel=Endpoint.Filesystem
    where Filesystem.action IN ("created","modified")
      AND (Filesystem.file_name IN ("node.js"))
    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 — A Denial of Service vulnerability discovered in the Axios JavaScript package - a
// Hunts the actual binaries / paths / commandline fragments named
// in the article instead of a generic technique-class template.
DeviceProcessEvents
| where Timestamp > ago(30d)
| where (FileName in~ ("node.js"))
| project Timestamp, DeviceName, AccountName, FileName,
          FolderPath, ProcessCommandLine,
          InitiatingProcessFileName, InitiatingProcessCommandLine
| order by Timestamp desc

// File-creation events for the named binaries / paths
DeviceFileEvents
| where Timestamp > ago(30d)
| where ActionType in ("FileCreated","FileModified")
| where (FileName in~ ("node.js"))
| 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.