CVE-2021-28715: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-w6w3-wf72-pc3c
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CVSS 6.5
CWE-404 CWE-770
Published
Advisory Summary

CVE-2021-28715 is a MODERATE (CVSS 6.5) security vulnerability vulnerability (CWE-404: Improper Resource Shutdown or Release) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not release or incorrectly releases a resource before it is made available for re-use.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-28715 at a Glance

CVE Identifier CVE-2021-28715
GHSA Identifier GHSA-w6w3-wf72-pc3c
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-404: Improper Resource Shutdown or Release
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.5

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:C/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 Changed (S:C)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2021-28715

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-2021-28715, 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-404: Improper Resource Shutdown or Release, where the product does not release or incorrectly releases a resource before it is made available for re-use. 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

Guest can force Linux netback driver to hog large amounts of kernel memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is ready to process them. There are some measures taken for avoiding to pile up too much data, but those can be bypassed by the guest: There is a timeout how long the client side of an interface can stop consuming new packets before it is assumed to have stalled, but this timeout is rather long (60 seconds by default). Using a UDP connection on a fast interface can easily accumulate gigabytes of data in that time. (CVE-2021-28715) The timeout could even never trigger if the guest manages to have only one free slot in its RX queue ring page and the next package would require more than one free slot, which may be the case when using GSO, XDP, or software hashing. (CVE-2021-28714)

References

NVD — CVE-2021-28715 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28715
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
Software Security Information SECURITY
https://www.debian.org/security/2022/dsa-5050
Software Security Information SECURITY
https://www.debian.org/security/2022/dsa-5096
xenbits.xenproject.org/xsa/advisory-392.tx... WEB
https://xenbits.xenproject.org/xsa/advisory-392.txt

Frequently Asked Questions

What is CVE-2021-28715?
CVE-2021-28715 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-404: Improper Resource Shutdown or Release.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2021-28715?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2021-28715?
CVE-2021-28715 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
What CWE is associated with CVE-2021-28715?
CVE-2021-28715 is classified under CWE-404: Improper Resource Shutdown or Release (The product does not release or incorrectly releases a resource before it is made available for re-use.).
How can I check Maven dependencies for CVE-2021-28715?
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-w6w3-wf72-pc3c",
  "modified" : "2022-03-17T00:06:16Z",
  "published" : "2022-01-07T00:00:34Z",
  "aliases" : [ "CVE-2021-28715" ],
  "details" : "Guest can force Linux netback driver to hog large amounts of kernel memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is ready to process them. There are some measures taken for avoiding to pile up too much data, but those can be bypassed by the guest: There is a timeout how long the client side of an interface can stop consuming new packets before it is assumed to have stalled, but this timeout is rather long (60 seconds by default). Using a UDP connection on a fast interface can easily accumulate gigabytes of data in that time. (CVE-2021-28715) The timeout could even never trigger if the guest manages to have only one free slot in its RX queue ring page and the next package would require more than one free slot, which may be the case when using GSO, XDP, or software hashing. (CVE-2021-28714)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-28715"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2022/dsa-5050"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2022/dsa-5096"
  }, {
    "type" : "WEB",
    "url" : "https://xenbits.xenproject.org/xsa/advisory-392.txt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-404", "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2022-01-06T18:15:00Z"
  }
}