Vulnerabilities in pkg:maven/org.matrix.android/matrix-android-sdk2

PACKAGE
Advisory Identifier: GHSA-jjmc-4p83-pp26
Share
Advisory Summary

CVE-2021-40824 is a MODERATE (CVSS 5.9) logic error vulnerability (CWE-327: Use of a Broken or Risky Cryptographic Algorithm) affecting Matrix android sdk2 libraries in the Maven ecosystem. The issue involves logic error in matrix sdk for android. Remediation is available by upgrading affected packages to version 1.2.2.

3 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:maven/org.matrix.android/matrix-android-sdk2

3 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:maven/org.matrix.android/matrix-android-sdk2. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-jjmc-4p83-pp26 CVE-2021-40824 MODERATE Logic error in Matrix SDK for Android
GHSA-fpgf-pjjv-2qgm CVE-2022-39248 HIGH matrix-android-sdk2 vulnerable to Olm/Megolm protocol confusion
GHSA-2pvj-p485-cp3m CVE-2022-39246 HIGH matrix-android-sdk2 vulnerable to impersonation via forwarded Megolm sessions

CVE-2021-40824 at a Glance

CVE Identifier CVE-2021-40824
GHSA Identifier GHSA-jjmc-4p83-pp26
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-327: Use of a Broken or Risky Cryptographic Algorithm
Affected Product Matrix android sdk2
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.9

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

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

How to Fix CVE-2021-40824

To remediate this vulnerability, upgrade all affected Matrix android sdk2 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.matrix.android:matrix-android-sdk2 fixed: 1.2.2 
<dependency>
    <groupId>org.matrix.android</groupId>
    <artifactId>matrix-android-sdk2</artifactId>
    <version>1.2.2</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.matrix.android

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2021-40824, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.matrix.android

Analyze the terminal output to locate any version of Matrix android sdk2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.2), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.matrix.android 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-327: Use of a Broken or Risky Cryptographic Algorithm, where the product uses a broken or risky cryptographic algorithm or protocol. In Matrix android sdk2, 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

A logic error in the room key sharing functionality of Element Android before 1.2.2 and matrix-android-sdk2 (aka Matrix SDK for Android) before 1.2.2 leads to a situation where identity verification is inadequate and thus a key-requesting device can be impersonated.

CVE-2021-40824 Affected Matrix android sdk2 Versions

1 component(s)
Fixed Versions:
1.2.2
Product / Package Ecosystem Affected Versions Fixed Version
org.matrix.android:matrix-android-sdk2
maven/org.matrix.android/matrix-android-sdk2
Maven
< 1.2.2
1.2.2

References

NVD — CVE-2021-40824 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-40824
Matrix android sdk2 Release RELEASE
https://github.com/matrix-org/matrix-android-sdk2/releases/tag/v1.2.2
matrix.org/blog/2021/09/13/vul... WEB
https://matrix.org/blog/2021/09/13/vulnerability-disclosure-key-sharing

Frequently Asked Questions

What is CVE-2021-40824?
CVE-2021-40824 is a security vulnerability in Matrix android sdk2 involving Logic error in Matrix SDK for Android under CWE-327: Use of a Broken or Risky Cryptographic Algorithm.
Which Matrix android sdk2 versions are affected?
Affected versions include releases prior to 1.2.2 across affected packages: org.matrix.android:matrix-android-sdk2.
What version fixes CVE-2021-40824?
Upgrading to 1.2.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is matrix-android-sdk2 affected?
Yes, org.matrix.android:matrix-android-sdk2 is affected in releases prior to 1.2.2. Upgrade your dependency to 1.2.2 or later.
What is the CVSS score of CVE-2021-40824?
CVE-2021-40824 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2021-40824?
CVE-2021-40824 is classified under CWE-327: Use of a Broken or Risky Cryptographic Algorithm (The product uses a broken or risky cryptographic algorithm or protocol.).
How can I check Maven dependencies for CVE-2021-40824?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.matrix.android'. 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-jjmc-4p83-pp26",
  "modified" : "2023-08-09T13:17:07Z",
  "published" : "2022-05-24T19:14:16Z",
  "aliases" : [ "CVE-2021-40824" ],
  "summary" : "Logic error in Matrix SDK for Android",
  "details" : "A logic error in the room key sharing functionality of Element Android before 1.2.2 and matrix-android-sdk2 (aka Matrix SDK for Android) before 1.2.2 leads to a situation where identity verification is inadequate and thus a key-requesting device can be impersonated.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.matrix.android:matrix-android-sdk2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-40824"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/matrix-org/matrix-android-sdk2/releases/tag/v1.2.2"
  }, {
    "type" : "WEB",
    "url" : "https://matrix.org/blog/2021/09/13/vulnerability-disclosure-key-sharing"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-327" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-09T13:17:07Z",
    "nvd_published_at" : "2021-09-13T19:15:00Z"
  }
}