CVE-2021-47045: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-7h2p-gcjg-4fw8
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CVSS 5.5
CWE-476
Published
Advisory Summary

CVE-2021-47045 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (CWE-476: NULL Pointer Dereference) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product dereferences a pointer that it expects to be valid but is null.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-47045 at a Glance

CVE Identifier CVE-2021-47045
GHSA Identifier GHSA-7h2p-gcjg-4fw8
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-476: NULL Pointer Dereference
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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

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

How to Fix CVE-2021-47045

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-2021-47045, 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-476: NULL Pointer Dereference, where the product dereferences a pointer that it expects to be valid but is null. 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

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix null pointer dereference in lpfc_prep_els_iocb() It is possible to call lpfc_issue_els_plogi() passing a did for which no matching ndlp is found. A call is then made to lpfc_prep_els_iocb() with a null pointer to a lpfc_nodelist structure resulting in a null pointer dereference. Fix by returning an error status if no valid ndlp is found. Fix up comments regarding ndlp reference counting.

References

NVD — CVE-2021-47045 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-47045
git.kernel.org/stable/c/8dd1c125f7... WEB
https://git.kernel.org/stable/c/8dd1c125f7f838abad009b64bff5f0a11afe3cb6
git.kernel.org/stable/c/9bdcfbed2a... WEB
https://git.kernel.org/stable/c/9bdcfbed2a9fe24d2c7eaa1bad7c705e18de8cc7
git.kernel.org/stable/c/a09677de45... WEB
https://git.kernel.org/stable/c/a09677de458d500b00701f6036baa423d9995408

Frequently Asked Questions

What is CVE-2021-47045?
CVE-2021-47045 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-476: NULL Pointer Dereference.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2021-47045?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2021-47045?
CVE-2021-47045 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2021-47045?
CVE-2021-47045 is classified under CWE-476: NULL Pointer Dereference (The product dereferences a pointer that it expects to be valid but is NULL.).
How can I check Maven dependencies for CVE-2021-47045?
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-7h2p-gcjg-4fw8",
  "modified" : "2024-12-06T21:30:35Z",
  "published" : "2024-02-28T09:30:38Z",
  "aliases" : [ "CVE-2021-47045" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: lpfc: Fix null pointer dereference in lpfc_prep_els_iocb()\n\nIt is possible to call lpfc_issue_els_plogi() passing a did for which no\nmatching ndlp is found. A call is then made to lpfc_prep_els_iocb() with a\nnull pointer to a lpfc_nodelist structure resulting in a null pointer\ndereference.\n\nFix by returning an error status if no valid ndlp is found. Fix up comments\nregarding ndlp reference counting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-47045"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8dd1c125f7f838abad009b64bff5f0a11afe3cb6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9bdcfbed2a9fe24d2c7eaa1bad7c705e18de8cc7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a09677de458d500b00701f6036baa423d9995408"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-476" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2024-02-28T09:15:40Z"
  }
}