CVE-2020-7043: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-4pqj-5gg5-44jh
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CVSS 9.1
CWE-295
Published
Advisory Summary

CVE-2020-7043 is a CRITICAL (CVSS 9.1) security vulnerability vulnerability (CWE-295: Improper Certificate Validation) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not validate, or incorrectly validates, a certificate.. Remediation is available in the latest vendor maintenance releases.

CVE-2020-7043 at a Glance

CVE Identifier CVE-2020-7043
GHSA Identifier GHSA-4pqj-5gg5-44jh
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.1

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:N).

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 None (A:N)

How to Fix CVE-2020-7043

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-2020-7043, 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-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. 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 issue was discovered in openfortivpn 1.11.0 when used with OpenSSL before 1.0.2. tunnel.c mishandles certificate validation because hostname comparisons do not consider '\0' characters, as demonstrated by a good.example.com\x00evil.example.com attack.

References

NVD — CVE-2020-7043 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7043
Software Source Repository REPOSITORY
https://github.com/adrienverge/openfortivpn/issues/536
Security Fix Commit FIX COMMIT
https://github.com/adrienverge/openfortivpn/commit/6328a070ddaab16faaf008cb9a8a62439c30f2a8
Security Fix Commit FIX COMMIT
https://github.com/adrienverge/openfortivpn/commit/cd9368c6a1b4ef91d77bb3fdbe2e5bc34aa6f4c4
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CKNKSGBVYGRRVRLFEFBEKUEJYJR5LWOF
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FF6HYIBREQGATRM5COF57MRQWKOKCWZ3
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SRVVNXCNTNMPCIAZIVR4FAGYCSU53FNA
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CKNKSGBVYGRRVRLFEFBEKUEJYJR5LWOF
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FF6HYIBREQGATRM5COF57MRQWKOKCWZ3
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SRVVNXCNTNMPCIAZIVR4FAGYCSU53FNA
Software Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00009.html
Software Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00011.html

Frequently Asked Questions

What is CVE-2020-7043?
CVE-2020-7043 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-295: Improper Certificate Validation.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2020-7043?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2020-7043?
CVE-2020-7043 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2020-7043?
CVE-2020-7043 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check Maven dependencies for CVE-2020-7043?
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-4pqj-5gg5-44jh",
  "modified" : "2024-04-04T02:48:25Z",
  "published" : "2022-05-24T17:09:52Z",
  "aliases" : [ "CVE-2020-7043" ],
  "details" : "An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL before 1.0.2. tunnel.c mishandles certificate validation because hostname comparisons do not consider '\\0' characters, as demonstrated by a good.example.com\\x00evil.example.com attack.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
    "type" : "WEB",
    "url" : "https://github.com/adrienverge/openfortivpn/issues/536"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/adrienverge/openfortivpn/commit/6328a070ddaab16faaf008cb9a8a62439c30f2a8"
  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CKNKSGBVYGRRVRLFEFBEKUEJYJR5LWOF"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FF6HYIBREQGATRM5COF57MRQWKOKCWZ3"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SRVVNXCNTNMPCIAZIVR4FAGYCSU53FNA"
  }, {
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    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CKNKSGBVYGRRVRLFEFBEKUEJYJR5LWOF"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FF6HYIBREQGATRM5COF57MRQWKOKCWZ3"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SRVVNXCNTNMPCIAZIVR4FAGYCSU53FNA"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00009.html"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00011.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2020-02-27T18:15:00Z"
  }
}