CVE-2019-12421: Nifi web security Apache NiFi User Log Out Vulnerability

Q: What is CVE-2019-12421?

CVE-2019-12421 is a security vulnerability in Nifi web security involving Apache NiFi user log out issue under CWE-613: Insufficient Session Expiration.

Q: Which Nifi web security versions are affected?

Affected versions include releases prior to 1.10.0 across affected packages: org.apache.nifi:nifi-web-security, org.apache.nifi:nifi-web-api.

Q: What version fixes CVE-2019-12421?

Upgrading to 1.10.0 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is nifi-web-security affected?

Yes, org.apache.nifi:nifi-web-security is affected in releases prior to 1.10.0. Upgrade your dependency to 1.10.0 or later.

Q: Is nifi-web-api affected?

Yes, org.apache.nifi:nifi-web-api is affected in releases prior to 1.10.0. Upgrade your dependency to 1.10.0 or later.

Q: What is the CVSS score of CVE-2019-12421?

CVE-2019-12421 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Q: What CWE is associated with CVE-2019-12421?

CVE-2019-12421 is classified under CWE-613: Insufficient Session Expiration (According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.").

Q: How can I check Maven dependencies for CVE-2019-12421?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.nifi'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

HIGH

Advisory Identifier: GHSA-fmqw-vqh5-cwq9

CVSS 8.8

CWE-613

Published 2019-12-02

Advisory Summary

CVE-2019-12421 is a HIGH (CVSS 8.8) apache nifi user log out vulnerability (CWE-613: Insufficient Session Expiration) affecting Nifi web security libraries in the Maven ecosystem. The issue involves apache nifi user log out issue. Remediation is available by upgrading affected packages to version 1.10.0.

CVE-2019-12421 at a Glance

CVE Identifier CVE-2019-12421

GHSA Identifier GHSA-fmqw-vqh5-cwq9

Severity HIGH

CVSS v3.1 Base Score 8.8

CWE Classification CWE-613: Insufficient Session Expiration

Affected Product Nifi web security

Package Ecosystem Maven

Published Date 2019-12-02

Last Updated 2021-08-19

Security Impact

CVSS: 8.8

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

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required Low (PR:L)

User Interaction None (UI:N)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability High (A:H)

How to Fix CVE-2019-12421

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

org.apache.nifi:nifi-web-security fixed: 1.10.0

<dependency>
    <groupId>org.apache.nifi</groupId>
    <artifactId>nifi-web-security</artifactId>
    <version>1.10.0</version>
</dependency>

org.apache.nifi:nifi-web-api fixed: 1.10.0

<dependency>
    <groupId>org.apache.nifi</groupId>
    <artifactId>nifi-web-api</artifactId>
    <version>1.10.0</version>
</dependency>

Verify Direct and Transitive Dependencies

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

mvn dependency:tree -Dincludes=org.apache.nifi

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2019-12421, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.nifi

Analyze the terminal output to locate any version of Nifi web security in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.10.0), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.nifi command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-613: Insufficient Session Expiration, where according to wasc, "insufficient session expiration is when a web site permits an attacker to reuse old session credentials or session ids for authorization.". In Nifi web security, 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

When using an authentication mechanism other than PKI, when the user clicks Log Out in NiFi versions 1.0.0 to 1.9.2, NiFi invalidates the authentication token on the client side but not on the server side. This permits the user's client-side token to be used for up to 12 hours after logging out to make API requests to NiFi.

CVE-2019-12421 Affected Nifi web security Versions

2 component(s)

Fixed Versions:

1.10.0

Product / Package	Ecosystem	Affected Versions	Fixed Version
org.apache.nifi:nifi-web-security maven/org.apache.nifi/nifi-web-security	Maven	≥ 1.3.0 < 1.10.0	1.10.0
org.apache.nifi:nifi-web-api maven/org.apache.nifi/nifi-web-api	Maven	≥ 1.3.0 < 1.10.0	1.10.0

References

NVD — CVE-2019-12421 NVD

https://nvd.nist.gov/vuln/detail/CVE-2019-12421

Nifi web security Source Repository REPOSITORY

https://github.com/apache/nifi/pull/3362

Security Fix Commit FIX COMMIT

https://github.com/apache/nifi/commit/cf6f5172503ce438c6c22c334c9367f774db7b24

lists.apache.org/thread.html/rca3793... WEB

https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b@%3Ccommits.nifi.apache.org%3E

Nifi web security Security Information SECURITY

https://nifi.apache.org/security.html#CVE-2019-12421

Frequently Asked Questions

What is CVE-2019-12421?

CVE-2019-12421 is a security vulnerability in Nifi web security involving Apache NiFi user log out issue under CWE-613: Insufficient Session Expiration.

Which Nifi web security versions are affected?

Affected versions include releases prior to 1.10.0 across affected packages: org.apache.nifi:nifi-web-security, org.apache.nifi:nifi-web-api.

What version fixes CVE-2019-12421?

Upgrading to 1.10.0 (or the latest patched release for your respective branch) resolves the vulnerability.

Is nifi-web-security affected?

Yes, org.apache.nifi:nifi-web-security is affected in releases prior to 1.10.0. Upgrade your dependency to 1.10.0 or later.

Is nifi-web-api affected?

Yes, org.apache.nifi:nifi-web-api is affected in releases prior to 1.10.0. Upgrade your dependency to 1.10.0 or later.

What is the CVSS score of CVE-2019-12421?

CVE-2019-12421 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2019-12421?

CVE-2019-12421 is classified under CWE-613: Insufficient Session Expiration (According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.").

How can I check Maven dependencies for CVE-2019-12421?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.nifi'. 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-fmqw-vqh5-cwq9",
  "modified" : "2021-08-19T16:03:16Z",
  "published" : "2019-12-02T18:19:39Z",
  "aliases" : [ "CVE-2019-12421" ],
  "summary" : "Apache NiFi user log out issue",
  "details" : "When using an authentication mechanism other than PKI, when the user clicks Log Out in NiFi versions 1.0.0 to 1.9.2, NiFi invalidates the authentication token on the client side but not on the server side. This permits the user's client-side token to be used for up to 12 hours after logging out to make API requests to NiFi.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.nifi:nifi-web-security"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.3.0"
      }, {
        "fixed" : "1.10.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.nifi:nifi-web-api"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.3.0"
      }, {
        "fixed" : "1.10.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-12421"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/nifi/pull/3362"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/nifi/commit/cf6f5172503ce438c6c22c334c9367f774db7b24"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b@%3Ccommits.nifi.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://nifi.apache.org/security.html#CVE-2019-12421"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-613" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-12-02T17:32:47Z",
    "nvd_published_at" : null
  }
}

CVSS V3

8.8 HIGH