CVE-2018-1000883: Plug Header Injection Vulnerability

MODERATE
Advisory Identifier: GHSA-9h73-w7ch-rh73
Share
CVSS 6.5
CWE-20
Published
Advisory Summary

CVE-2018-1000883 is a MODERATE (CVSS 6.5) header injection vulnerability (CWE-20: Improper Input Validation) affecting Plug libraries in the Hex ecosystem. The issue involves header injection. Remediation is available by upgrading affected packages to version 1.0.6, 1.1.9, 1.2.5, 1.3.5.

CVE-2018-1000883 at a Glance

CVE Identifier CVE-2018-1000883
GHSA Identifier GHSA-9h73-w7ch-rh73
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Plug
Package Ecosystem Hex
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N).

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

How to Fix CVE-2018-1000883

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

plug fixed: 1.0.6 
Upgrade plug to 1.0.6
plug fixed: 1.1.9 
Upgrade plug to 1.1.9
plug fixed: 1.2.5 
Upgrade plug to 1.2.5
plug fixed: 1.3.5 
Upgrade plug to 1.3.5
Verify Direct and Transitive Dependencies

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

inspect dependencies for plug

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-1000883, inspect your project dependencies for Plug:

inspect dependencies for plug

Analyze the terminal output to locate any version of Plug in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.6), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Plug, 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

Elixir Plug Plug version All contains a Header Injection vulnerability in Connection that can result in Given a cookie value, Headers can be added. This attack appear to be exploitable via Crafting a value to be sent as a cookie. This vulnerability appears to have been fixed in >= 1.3.5 or ~> 1.2.5 or ~> 1.1.9 or ~> 1.0.6.

CVE-2018-1000883 Affected Plug Versions

4 component(s)
Fixed Versions:
1.0.61.1.91.2.51.3.5
Product / Package Ecosystem Affected Versions Fixed Version
plug
 Hex
< 1.0.6
1.0.6
plug
 Hex
≥ 1.1.0
< 1.1.9
1.1.9
plug
 Hex
≥ 1.2.0
< 1.2.5
1.2.5
plug
 Hex
≥ 1.3.0
< 1.3.5
1.3.5

References

NVD — CVE-2018-1000883 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000883
Security Fix Commit FIX COMMIT
https://github.com/elixir-plug/plug/commit/8857f8ab4acf9b9c22e80480dae2636692f5f573
Plug Source Repository REPOSITORY
https://github.com/dependabot/elixir-security-advisories/blob/master/packages/plug/2017-04-17.yml
Plug Source Repository REPOSITORY
https://github.com/elixir-plug/plug

Frequently Asked Questions

What is CVE-2018-1000883?
CVE-2018-1000883 is a security vulnerability in Plug involving Header Injection under CWE-20: Improper Input Validation.
Which Plug versions are affected?
Affected versions include releases prior to 1.0.6, 1.1.9, 1.2.5, 1.3.5 across affected packages: plug.
What version fixes CVE-2018-1000883?
Upgrading to 1.0.6, 1.1.9, 1.2.5, 1.3.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is plug affected?
Yes, plug is affected in releases prior to 1.0.6, 1.1.9, 1.2.5, 1.3.5. Upgrade your dependency to 1.0.6, 1.1.9, 1.2.5, 1.3.5 or later.
What is the CVSS score of CVE-2018-1000883?
CVE-2018-1000883 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2018-1000883?
CVE-2018-1000883 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Hex dependencies for CVE-2018-1000883?
Run the dependency tree command: 'inspect dependencies for plug'. 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-9h73-w7ch-rh73",
  "modified" : "2022-04-12T21:26:27Z",
  "published" : "2022-04-12T21:26:27Z",
  "aliases" : [ "CVE-2018-1000883" ],
  "summary" : "Header Injection",
  "details" : "Elixir Plug Plug version All contains a Header Injection vulnerability in Connection that can result in Given a cookie value, Headers can be added. This attack appear to be exploitable via Crafting a value to be sent as a cookie. This vulnerability appears to have been fixed in >= 1.3.5 or ~> 1.2.5 or ~> 1.1.9 or ~> 1.0.6.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Hex",
      "name" : "plug"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Hex",
      "name" : "plug"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.1.0"
      }, {
        "fixed" : "1.1.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Hex",
      "name" : "plug"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.2.0"
      }, {
        "fixed" : "1.2.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Hex",
      "name" : "plug"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.3.0"
      }, {
        "fixed" : "1.3.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000883"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/elixir-plug/plug/commit/8857f8ab4acf9b9c22e80480dae2636692f5f573"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dependabot/elixir-security-advisories/blob/master/packages/plug/2017-04-17.yml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/elixir-plug/plug"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-04-12T21:26:27Z",
    "nvd_published_at" : null
  }
}