CVE-2021-42726: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-qm97-3g92-vvvg
Share
CVSS 7.8
CWE-788 CWE-119
Published
Advisory Summary

CVE-2021-42726 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-788: Access of Memory Location After End of Buffer) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reads or writes to a buffer using an index or pointer that references a memory location after the end of the buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-42726 at a Glance

CVE Identifier CVE-2021-42726
GHSA Identifier GHSA-qm97-3g92-vvvg
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-788: Access of Memory Location After End of Buffer
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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

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

How to Fix CVE-2021-42726

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-2021-42726, 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 CWE-788: Access of Memory Location After End of Buffer, where the product reads or writes to a buffer using an index or pointer that references a memory location after the end of the buffer. 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

Adobe Media Encoder version 15.4 (and earlier) are affected by a memory corruption vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious M4A file.

References

NVD — CVE-2021-42726 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42726
Software Security Information SECURITY
https://helpx.adobe.com/security/products/bridge/apsb21-94.html
Software Security Information SECURITY
https://helpx.adobe.com/security/products/media-encoder/apsb21-70.html

Frequently Asked Questions

What is CVE-2021-42726?
CVE-2021-42726 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-788: Access of Memory Location After End of Buffer.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2021-42726?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2021-42726?
CVE-2021-42726 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-42726?
CVE-2021-42726 is classified under CWE-788: Access of Memory Location After End of Buffer (The product reads or writes to a buffer using an index or pointer that references a memory location after the end of the buffer.).
How can I check Maven dependencies for CVE-2021-42726?
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-qm97-3g92-vvvg",
  "modified" : "2022-05-24T19:20:46Z",
  "published" : "2022-05-24T19:20:46Z",
  "aliases" : [ "CVE-2021-42726" ],
  "details" : "Adobe Media Encoder version 15.4 (and earlier) are affected by a memory corruption vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious M4A file.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-42726"
  }, {
    "type" : "WEB",
    "url" : "https://helpx.adobe.com/security/products/bridge/apsb21-94.html"
  }, {
    "type" : "WEB",
    "url" : "https://helpx.adobe.com/security/products/media-encoder/apsb21-70.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119", "CWE-788" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2021-11-16T20:15:00Z"
  }
}