CVE-2021-3593: Software Security Vulnerability Vulnerability

LOW
Advisory Identifier: GHSA-3qp6-x64q-v369
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CVSS 3.8
CWE-824
Published
Advisory Summary

CVE-2021-3593 is a LOW (CVSS 3.8) security vulnerability vulnerability (CWE-824: Access of Uninitialized Pointer) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product accesses or uses a pointer that has not been initialized.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-3593 at a Glance

CVE Identifier CVE-2021-3593
GHSA Identifier GHSA-3qp6-x64q-v369
Severity LOW
CVSS v3.1 Base Score 3.8
CWE Classification CWE-824: Access of Uninitialized Pointer
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 3.8

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:C/C:L/I:N/A:N).

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

How to Fix CVE-2021-3593

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-2021-3593, 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-824: Access of Uninitialized Pointer, where the product accesses or uses a pointer that has not been initialized. 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

An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.

References

NVD — CVE-2021-3593 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3593
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1970487
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI
Software Security Information SECURITY
https://security.gentoo.org/glsa/202107-44
Software Security Information SECURITY
https://security.netapp.com/advisory/ntap-20210805-0004

Frequently Asked Questions

What is CVE-2021-3593?
CVE-2021-3593 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-824: Access of Uninitialized Pointer.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2021-3593?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2021-3593?
CVE-2021-3593 has a CVSS v3.1 base score of 3.8 (LOW) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
What CWE is associated with CVE-2021-3593?
CVE-2021-3593 is classified under CWE-824: Access of Uninitialized Pointer (The product accesses or uses a pointer that has not been initialized.).
How can I check Maven dependencies for CVE-2021-3593?
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-3qp6-x64q-v369",
  "modified" : "2022-05-24T19:05:19Z",
  "published" : "2022-05-24T19:05:19Z",
  "aliases" : [ "CVE-2021-3593" ],
  "details" : "An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-3593"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1970487"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/202107-44"
  }, {
    "type" : "WEB",
    "url" : "https://security.netapp.com/advisory/ntap-20210805-0004"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-824" ],
    "severity" : "LOW",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2021-06-15T21:15:00Z"
  }
}