CVE-2021-43564: Hov/jobfair Unrestricted Access To Predictable File Vulnerability

HIGH
Advisory Identifier: GHSA-43g8-79x3-j898
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CVSS 7.5
CWE-200
Published
Advisory Summary

CVE-2021-43564 is a HIGH (CVSS 7.5) unrestricted access to predictable file vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Hov/jobfair libraries in the Packagist ecosystem. The issue involves unrestricted access to predictable file paths in hov/jobfair. Remediation is available by upgrading affected packages to version 1.0.13, 2.0.2.

CVE-2021-43564 at a Glance

CVE Identifier CVE-2021-43564
GHSA Identifier GHSA-43g8-79x3-j898
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Hov/jobfair
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/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 None (I:N)
Availability None (A:N)

How to Fix CVE-2021-43564

To remediate this vulnerability, upgrade all affected Hov/jobfair dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

hov/jobfair fixed: 1.0.13 
Upgrade hov/jobfair to 1.0.13
hov/jobfair fixed: 2.0.2 
Upgrade hov/jobfair to 2.0.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for hov/jobfair

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-43564, inspect your project dependencies for Hov/jobfair:

inspect dependencies for hov/jobfair

Analyze the terminal output to locate any version of Hov/jobfair in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.13), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Hov/jobfair, 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 the jobfair (aka Job Fair) extension before 1.0.13 and 2.x before 2.0.2 for TYPO3. The extension fails to protect or obfuscate filenames of uploaded files. This allows unauthenticated users to download files with sensitive data by simply guessing the filename of uploaded files (e.g., uploads/tx_jobfair/cv.pdf).

CVE-2021-43564 Affected Hov/jobfair Versions

2 component(s)
Fixed Versions:
1.0.132.0.2
Product / Package Ecosystem Affected Versions Fixed Version
hov/jobfair
 Packagist
< 1.0.13
1.0.13
hov/jobfair
 Packagist
≥ 2.0.0
< 2.0.2
2.0.2

References

NVD — CVE-2021-43564 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43564
Hov/jobfair Source Repository REPOSITORY
https://github.com/nhovratov/jobfair
Hov/jobfair Security Information SECURITY
https://typo3.org/security/advisory/typo3-ext-sa-2021-018

Frequently Asked Questions

What is CVE-2021-43564?
CVE-2021-43564 is a security vulnerability in Hov/jobfair involving Unrestricted access to predictable file paths in hov/jobfair under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Hov/jobfair versions are affected?
Affected versions include releases prior to 1.0.13, 2.0.2 across affected packages: hov/jobfair.
What version fixes CVE-2021-43564?
Upgrading to 1.0.13, 2.0.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is hov/jobfair affected?
Yes, hov/jobfair is affected in releases prior to 1.0.13, 2.0.2. Upgrade your dependency to 1.0.13, 2.0.2 or later.
What is the CVSS score of CVE-2021-43564?
CVE-2021-43564 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2021-43564?
CVE-2021-43564 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Packagist dependencies for CVE-2021-43564?
Run the dependency tree command: 'inspect dependencies for hov/jobfair'. 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-43g8-79x3-j898",
  "modified" : "2021-11-17T21:24:11Z",
  "published" : "2021-11-15T17:36:22Z",
  "aliases" : [ "CVE-2021-43564" ],
  "summary" : "Unrestricted access to predictable file paths in hov/jobfair",
  "details" : "An issue was discovered in the jobfair (aka Job Fair) extension before 1.0.13 and 2.x before 2.0.2 for TYPO3. The extension fails to protect or obfuscate filenames of uploaded files. This allows unauthenticated users to download files with sensitive data by simply guessing the filename of uploaded files (e.g., uploads/tx_jobfair/cv.pdf).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "hov/jobfair"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.13"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "hov/jobfair"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-43564"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/nhovratov/jobfair"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-ext-sa-2021-018"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-11-12T19:39:33Z",
    "nvd_published_at" : "2021-11-10T16:15:00Z"
  }
}