Vulnerabilities in pkg:golang/github.com/cloudflare/cloudflared

PACKAGE
Advisory Identifier: GHSA-7mjv-x3jf-545x
Advisory Summary

CVE-2023-1314 is a HIGH (CVSS 7.5) cloudflared's installer has local privilege vulnerability (CWE-59: Improper Link Resolution Before File Access ('Link Following')) affecting Github.com/cloudflare/cloudflared libraries in the Go ecosystem. The issue involves cloudflared's installer has local privilege escalation vulnerability. Remediation is available by upgrading affected packages to version 0.0.0-20230313153246-f686da832f85.

2 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/github.com/cloudflare/cloudflared

2 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:golang/github.com/cloudflare/cloudflared. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-7mjv-x3jf-545x CVE-2023-1314 HIGH cloudflared's Installer has Local Privilege Escalation Vulnerability
GHSA-hgwp-4vp4-qmm2 CVE-2020-24356 HIGH Local Privilege Escalation in cloudflared

CVE-2023-1314 at a Glance

CVE Identifier CVE-2023-1314
GHSA Identifier GHSA-7mjv-x3jf-545x
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-59: Improper Link Resolution Before File Access ('Link Following')
Affected Product Github.com/cloudflare/cloudflared
Package Ecosystem Go
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:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H).

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

How to Fix CVE-2023-1314

To remediate this vulnerability, upgrade all affected Github.com/cloudflare/cloudflared 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/cloudflare/cloudflared fixed: 0.0.0-20230313153246-f686da832f85
Upgrade github.com/cloudflare/cloudflared to 0.0.0-20230313153246-f686da832f85
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/cloudflare/cloudflared

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-1314, inspect your project dependencies for Github.com/cloudflare/cloudflared:

inspect dependencies for github.com/cloudflare/cloudflared

Analyze the terminal output to locate any version of Github.com/cloudflare/cloudflared in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.0-20230313153246-f686da832f85), 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-59: Improper Link Resolution Before File Access ('Link Following'), where the product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. In Github.com/cloudflare/cloudflared, 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

### Impact A vulnerability has been discovered in cloudflared's installer (<= 2023.3.0) for Windows 32-bits devices that allows a local attacker with no administrative permissions to escalate their privileges on the affected device. This vulnerability exists because the MSI installer used by cloudflared relied on a world-writable directory. An attacker with local access to the device (without Administrator rights) can use symbolic links to trick the MSI installer into deleting files in locations that the attacker would otherwise have no access to. By creating a symlink from the world-writable directory to the target file, the attacker can manipulate the MSI installer's repair functionality to delete the target file during the repair process. Exploitation of this vulnerability could allow an attacker to delete important system files or replace them with malicious files, potentially leading to the affected device being compromised. **The cloudflared client itself is not affected by this vulnerability, only the installer for 32-bit Windows devices.** ### Patches A new installer was released as part of version 2023.3.1, corresponding to pseudoversion 0.0.0-20230313153246-f686da832f85 on pkg.go.dev. Users are encouraged to remove old installers from their systems. ### References [Cloudflared Releases](https://github.com/cloudflare/cloudflared/releases)

CVE-2023-1314 Affected Github.com/cloudflare/cloudflared Versions

1 component(s)
Fixed Versions:
0.0.0-20230313153246-f686da832f85
Product / Package Ecosystem Affected Versions Fixed Version
github.com/cloudflare/cloudflared
Go
< 0.0.0-20230313153246-f686da832f85
0.0.0-20230313153246-f686da832f85

References

Frequently Asked Questions

What is CVE-2023-1314?
CVE-2023-1314 is a security vulnerability in Github.com/cloudflare/cloudflared involving cloudflared's Installer has Local Privilege Escalation Vulnerability under CWE-59: Improper Link Resolution Before File Access ('Link Following').
Which Github.com/cloudflare/cloudflared versions are affected?
Affected versions include releases prior to 0.0.0-20230313153246-f686da832f85 across affected packages: github.com/cloudflare/cloudflared.
What version fixes CVE-2023-1314?
Upgrading to 0.0.0-20230313153246-f686da832f85 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/cloudflare/cloudflared affected?
Yes, github.com/cloudflare/cloudflared is affected in releases prior to 0.0.0-20230313153246-f686da832f85. Upgrade your dependency to 0.0.0-20230313153246-f686da832f85 or later.
What is the CVSS score of CVE-2023-1314?
CVE-2023-1314 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H.
What CWE is associated with CVE-2023-1314?
CVE-2023-1314 is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following') (The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.).
How can I check Go dependencies for CVE-2023-1314?
Run the dependency tree command: 'inspect dependencies for github.com/cloudflare/cloudflared'. 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
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7mjv-x3jf-545x",
  "modified" : "2023-03-21T22:32:50Z",
  "published" : "2023-03-21T22:32:50Z",
  "aliases" : [ "CVE-2023-1314" ],
  "summary" : "cloudflared's Installer has Local Privilege Escalation Vulnerability",
  "details" : "### Impact\n\nA vulnerability has been discovered in cloudflared's installer (<= 2023.3.0) for Windows 32-bits devices that allows a local attacker with no administrative permissions to escalate their privileges on the affected device. This vulnerability exists because the MSI installer used by cloudflared relied on a world-writable directory.\n\nAn attacker with local access to the device (without Administrator rights) can use symbolic links to trick the MSI installer into deleting files in locations that the attacker would otherwise have no access to. By creating a symlink from the world-writable directory to the target file, the attacker can manipulate the MSI installer's repair functionality to delete the target file during the repair process.\n\nExploitation of this vulnerability could allow an attacker to delete important system files or replace them with malicious files, potentially leading to the affected device being compromised.\n\n**The cloudflared client itself is not affected by this vulnerability, only the installer for 32-bit Windows devices.**\n\n### Patches\nA new installer was released as part of version 2023.3.1, corresponding to pseudoversion 0.0.0-20230313153246-f686da832f85 on pkg.go.dev. Users are encouraged to remove old installers from their systems.\n\n### References\n[Cloudflared Releases](https://github.com/cloudflare/cloudflared/releases)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cloudflare/cloudflared"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.0-20230313153246-f686da832f85"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/cloudflared/security/advisories/GHSA-7mjv-x3jf-545x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-1314"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/cloudflared/commit/9c15f31d003bebfbe6467c2b42972df3e7c9b886"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cloudflare/cloudflared"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/cloudflared/releases"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-59" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-21T22:32:50Z",
    "nvd_published_at" : "2023-03-21T12:15:00Z"
  }
}