CVE-2016-10703: Ecstatic Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-pm9p-9926-w68m
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CVSS 7.5
CWE-400
Published
Advisory Summary

CVE-2016-10703 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Ecstatic libraries in the npm ecosystem. The issue involves denial of service in ecstatic. Remediation is available by upgrading affected packages to version 2.0.0.

CVE-2016-10703 at a Glance

CVE Identifier CVE-2016-10703
GHSA Identifier GHSA-pm9p-9926-w68m
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Ecstatic
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2016-10703

To remediate this vulnerability, upgrade all affected Ecstatic dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

ecstatic fixed: 2.0.0 
npm install ecstatic@2.0.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls ecstatic

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2016-10703, inspect your project dependencies using npm:

npm ls ecstatic

Analyze the terminal output to locate any version of Ecstatic in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.0), your application is affected.

Note: The npm ls ecstatic command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Ecstatic, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

`ecstatic`, a simple static file server middleware, is vulnerable to denial of service. If a payload with a large number of null bytes (`%00`) is provided by an attacker it can crash ecstatic by running it out of memory. [Results from the original advisory](https://www.checkmarx.com/advisories/denial-of-service-dos-vulnerability-in-ecstatic-npm-package/) ``` A payload of 22kB caused a lag of 1 second, A payload of 35kB caused a lag of 3 seconds, A payload of 86kB caused the server to crash ``` ## Recommendation Update to version 2.0.0 or later.

CVE-2016-10703 Affected Ecstatic Versions

1 component(s)
Fixed Versions:
2.0.0
Product / Package Ecosystem Affected Versions Fixed Version
ecstatic
npm/ecstatic
npm
< 2.0.0
2.0.0

References

NVD — CVE-2016-10703 NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-10703
Security Fix Commit FIX COMMIT
https://github.com/jfhbrook/node-ecstatic/commit/71ce93988ead4b561a8592168c72143907189f01
Security Fix Commit FIX COMMIT
https://github.com/jfhbrook/node-ecstatic/commit/71ce93988ead4b561a8592168c72143907189f01#diff-b2b5a88fb51675f1aa1065c093dce1ee
advisory.checkmarx.net/advisory/cx-2016-44... WEB
https://advisory.checkmarx.net/advisory/CX-2016-4450
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-pm9p-9926-w68m
Ecstatic Source Repository REPOSITORY
https://github.com/jfhbrook/node-ecstatic
www.checkmarx.com/advisories/denial-o... WEB
https://www.checkmarx.com/advisories/denial-of-service-dos-vulnerability-in-ecstatic-npm-package
www.npmjs.com/advisories/553 WEB
https://www.npmjs.com/advisories/553

Frequently Asked Questions

What is CVE-2016-10703?
CVE-2016-10703 is a security vulnerability in Ecstatic involving Denial of Service in ecstatic under CWE-400: Uncontrolled Resource Consumption.
Which Ecstatic versions are affected?
Affected versions include releases prior to 2.0.0 across affected packages: ecstatic.
What version fixes CVE-2016-10703?
Upgrading to 2.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ecstatic affected?
Yes, ecstatic is affected in releases prior to 2.0.0. Upgrade your dependency to 2.0.0 or later.
What is the CVSS score of CVE-2016-10703?
CVE-2016-10703 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2016-10703?
CVE-2016-10703 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for CVE-2016-10703?
Run the dependency tree command: 'npm ls ecstatic'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pm9p-9926-w68m",
  "modified" : "2021-09-16T18:15:09Z",
  "published" : "2017-12-28T22:52:47Z",
  "aliases" : [ "CVE-2016-10703" ],
  "summary" : "Denial of Service in ecstatic",
  "details" : "`ecstatic`, a simple static file server middleware, is vulnerable to denial of service. If a payload with a large number of null bytes (`%00`) is provided by an attacker it can crash ecstatic by running it out of memory.\n\n\n[Results from the original advisory](https://www.checkmarx.com/advisories/denial-of-service-dos-vulnerability-in-ecstatic-npm-package/)\n\n```\nA payload of 22kB caused a lag of 1 second,\nA payload of 35kB caused a lag of 3 seconds,\nA payload of 86kB caused the server to crash\n```\n\n\n## Recommendation\n\nUpdate to version 2.0.0 or later.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "ecstatic"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2016-10703"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jfhbrook/node-ecstatic/commit/71ce93988ead4b561a8592168c72143907189f01"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jfhbrook/node-ecstatic/commit/71ce93988ead4b561a8592168c72143907189f01#diff-b2b5a88fb51675f1aa1065c093dce1ee"
  }, {
    "type" : "WEB",
    "url" : "https://advisory.checkmarx.net/advisory/CX-2016-4450"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-pm9p-9926-w68m"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jfhbrook/node-ecstatic"
  }, {
    "type" : "WEB",
    "url" : "https://www.checkmarx.com/advisories/denial-of-service-dos-vulnerability-in-ecstatic-npm-package"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/553"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:49:34Z",
    "nvd_published_at" : "2017-12-14T19:29:00Z"
  }
}