CVE-2023-39240: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-pjc4-2x49-3j92
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CVSS 9.8
CWE-134
Published
Advisory Summary

CVE-2023-39240 is a HIGH (CVSS 9.8) security vulnerability vulnerability (CWE-134: Use of Externally-Controlled Format String) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses a function that accepts a format string as an argument, but the format string originates from an external source.. Remediation is available in the latest vendor maintenance releases.

CVE-2023-39240 at a Glance

CVE Identifier CVE-2023-39240
GHSA Identifier GHSA-pjc4-2x49-3j92
Severity HIGH
CVSS v3.1 Base Score 9.8
CWE Classification CWE-134: Use of Externally-Controlled Format String
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2023-39240

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-2023-39240, 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-134: Use of Externally-Controlled Format String, where the product uses a function that accepts a format string as an argument, but the format string originates from an external source. 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

It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. An unauthenticated remote attacker can exploit this vulnerability without privilege to perform remote arbitrary code execution, arbitrary system operation or disrupt service.

References

NVD — CVE-2023-39240 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-39240
www.twcert.org.tw/tw/cp-132-7356-021b... WEB
https://www.twcert.org.tw/tw/cp-132-7356-021bf-1.html

Frequently Asked Questions

What is CVE-2023-39240?
CVE-2023-39240 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-134: Use of Externally-Controlled Format String.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2023-39240?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2023-39240?
CVE-2023-39240 has a CVSS v3.1 base score of 9.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2023-39240?
CVE-2023-39240 is classified under CWE-134: Use of Externally-Controlled Format String (The product uses a function that accepts a format string as an argument, but the format string originates from an external source.).
How can I check Maven dependencies for CVE-2023-39240?
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-pjc4-2x49-3j92",
  "modified" : "2024-03-27T09:30:39Z",
  "published" : "2023-09-07T09:30:15Z",
  "aliases" : [ "CVE-2023-39240" ],
  "details" : "\nIt is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. An unauthenticated remote attacker can exploit this vulnerability without privilege to perform remote arbitrary code execution, arbitrary system operation or disrupt service.\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-39240"
  }, {
    "type" : "WEB",
    "url" : "https://www.twcert.org.tw/tw/cp-132-7356-021bf-1.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-134" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2023-09-07T08:15:07Z"
  }
}