CVE-2023-33965: Github.com/txthinking/brook Brook's Tproxy Server Is Vulnerable Vulnerability

CRITICAL
Advisory Identifier: GHSA-vfrj-fv6p-3cpf
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CVSS 9.6
CWE-78
Published
Advisory Summary

CVE-2023-33965 is a CRITICAL (CVSS 9.6) brook's tproxy server is vulnerable vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Github.com/txthinking/brook libraries in the Go ecosystem. The issue involves brook's tproxy server is vulnerable to a drive-by command injection.. Remediation is available by upgrading affected packages to version 20230606.

CVE-2023-33965 at a Glance

CVE Identifier CVE-2023-33965
GHSA Identifier GHSA-vfrj-fv6p-3cpf
Severity CRITICAL
CVSS v3.1 Base Score 9.6
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product Github.com/txthinking/brook
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 9.6

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:R/S:C/C:H/I:H/A:H).

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

How to Fix CVE-2023-33965

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

github.com/txthinking/brook fixed: 20230606 
Upgrade github.com/txthinking/brook to 20230606
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 github.com/txthinking/brook

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-33965, inspect your project dependencies for Github.com/txthinking/brook:

inspect dependencies for github.com/txthinking/brook

Analyze the terminal output to locate any version of Github.com/txthinking/brook in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 20230606), 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-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Github.com/txthinking/brook, 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

The `tproxy` server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local `tproxy` service leading to remote code execution.

CVE-2023-33965 Affected Github.com/txthinking/brook Versions

1 component(s)
Fixed Versions:
20230606
Product / Package Ecosystem Affected Versions Fixed Version
github.com/txthinking/brook
golang/github.com/txthinking/brook
Go
< 20230606
20230606

References

GitHub Advisory / Wiki ADVISORY
https://github.com/txthinking/brook/security/advisories/GHSA-vfrj-fv6p-3cpf
NVD — CVE-2023-33965 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-33965
Security Fix Commit FIX COMMIT
https://github.com/txthinking/brook/commit/314d7070c37babf6c38a0fe1eada872bb74bf03e
Github.com/txthinking/brook Source Repository REPOSITORY
https://github.com/txthinking/brook

Frequently Asked Questions

What is CVE-2023-33965?
CVE-2023-33965 is a security vulnerability in Github.com/txthinking/brook involving Brook's tproxy server is vulnerable to a drive-by command injection. under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which Github.com/txthinking/brook versions are affected?
Affected versions include releases prior to 20230606 across affected packages: github.com/txthinking/brook.
What version fixes CVE-2023-33965?
Upgrading to 20230606 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/txthinking/brook affected?
Yes, github.com/txthinking/brook is affected in releases prior to 20230606. Upgrade your dependency to 20230606 or later.
What is the CVSS score of CVE-2023-33965?
CVE-2023-33965 has a CVSS v3.1 base score of 9.6 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2023-33965?
CVE-2023-33965 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check Go dependencies for CVE-2023-33965?
Run the dependency tree command: 'inspect dependencies for github.com/txthinking/brook'. 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-vfrj-fv6p-3cpf",
  "modified" : "2023-06-06T01:38:11Z",
  "published" : "2023-06-06T01:38:11Z",
  "aliases" : [ "CVE-2023-33965" ],
  "summary" : "Brook's tproxy server is vulnerable to a drive-by command injection.",
  "details" : "The `tproxy` server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local `tproxy` service leading to remote code execution.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/txthinking/brook"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "20230606"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/txthinking/brook/security/advisories/GHSA-vfrj-fv6p-3cpf"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-33965"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/txthinking/brook/commit/314d7070c37babf6c38a0fe1eada872bb74bf03e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/txthinking/brook"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-06-06T01:38:11Z",
    "nvd_published_at" : "2023-06-01T15:15:09Z"
  }
}