CVE-2021-23969: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-hrpc-c9c2-pj6w
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CVSS 4.3
Published
Advisory Summary

CVE-2021-23969 is a MODERATE (CVSS 4.3) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2021-23969 at a Glance

CVE Identifier CVE-2021-23969
GHSA Identifier GHSA-hrpc-c9c2-pj6w
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:R/S:U/C:L/I:N/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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2021-23969

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

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

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2021-23969, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

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

Note: The mvn dependency:tree 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 General Security Weakness. In Software, 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

As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

References

NVD — CVE-2021-23969 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23969
bugzilla.mozilla.org/show_bug.cgi WEB
https://bugzilla.mozilla.org/show_bug.cgi?id=1542194
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html
Software Security Information SECURITY
https://security.gentoo.org/glsa/202104-09
Software Security Information SECURITY
https://security.gentoo.org/glsa/202104-10
Software Security Information SECURITY
https://www.debian.org/security/2021/dsa-4866
Software Security Information SECURITY
https://www.mozilla.org/security/advisories/mfsa2021-07
Software Security Information SECURITY
https://www.mozilla.org/security/advisories/mfsa2021-08
Software Security Information SECURITY
https://www.mozilla.org/security/advisories/mfsa2021-09

Frequently Asked Questions

What is CVE-2021-23969?
CVE-2021-23969 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2021-23969?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2021-23969?
CVE-2021-23969 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2021-23969?
CVE-2021-23969 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2021-23969?
Run the dependency tree command: 'mvn dependency:tree'. 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-hrpc-c9c2-pj6w",
  "modified" : "2022-05-28T00:00:21Z",
  "published" : "2022-05-24T22:28:43Z",
  "aliases" : [ "CVE-2021-23969" ],
  "details" : "As specified in the W3C Content Security Policy draft, when creating a violation report, \"User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage.\" Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-23969"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.mozilla.org/show_bug.cgi?id=1542194"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/202104-09"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/202104-10"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2021/dsa-4866"
  }, {
    "type" : "WEB",
    "url" : "https://www.mozilla.org/security/advisories/mfsa2021-07"
  }, {
    "type" : "WEB",
    "url" : "https://www.mozilla.org/security/advisories/mfsa2021-08"
  }, {
    "type" : "WEB",
    "url" : "https://www.mozilla.org/security/advisories/mfsa2021-09"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2021-02-26T02:15:00Z"
  }
}