GHSA-w4f8-fxq2-j35v: Github.com/google/fscrypt Possible Privilege Escalation Vulnerability

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Advisory Summary

GHSA-w4f8-fxq2-j35v is a MODERATE possible privilege escalation vulnerability (General Security Weakness) affecting Github.com/google/fscrypt libraries in the Go ecosystem. The issue involves possible privilege escalation via bash completion script. Remediation is available by upgrading affected packages to version 0.3.3.

GHSA-w4f8-fxq2-j35v at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-w4f8-fxq2-j35v
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Github.com/google/fscrypt
Package Ecosystem Go
Published Date
Last Updated

How to Fix GHSA-w4f8-fxq2-j35v

To remediate this vulnerability, upgrade all affected Github.com/google/fscrypt 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/google/fscrypt fixed: 0.3.3 
Upgrade github.com/google/fscrypt to 0.3.3
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/google/fscrypt

How to Check if You Are Affected

To determine whether your application is affected by GHSA-w4f8-fxq2-j35v, inspect your project dependencies for Github.com/google/fscrypt:

inspect dependencies for github.com/google/fscrypt

Analyze the terminal output to locate any version of Github.com/google/fscrypt in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.3.3), 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 General Security Weakness. In Github.com/google/fscrypt, 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 bash completion script for `fscrypt` through v0.3.2 allows injection of commands via crafted mountpoint paths, allowing privilege escalation under a specific set of circumstances. A local user who has control over mountpoint paths could potentially escalate their privileges if they create a malicious mountpoint path and if the system administrator happens to be using the `fscrypt` bash completion script to complete mountpoint paths. We recommend upgrading to v0.3.3 or above. For more details, see [CVE-2022-25328](https://www.cve.org/CVERecord?id=CVE-2022-25328).

GHSA-w4f8-fxq2-j35v Affected Github.com/google/fscrypt Versions

1 component(s)
Fixed Versions:
0.3.3
Product / Package Ecosystem Affected Versions Fixed Version
github.com/google/fscrypt
golang/github.com/google/fscrypt
Go
< 0.3.3
0.3.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/google/fscrypt/security/advisories/GHSA-w4f8-fxq2-j35v
github.com/google/fs... PACKAGE
github.com/google/fscrypt

Frequently Asked Questions

What is GHSA-w4f8-fxq2-j35v?
GHSA-w4f8-fxq2-j35v is a security vulnerability in Github.com/google/fscrypt involving Possible privilege escalation via bash completion script under General Security Weakness.
Which Github.com/google/fscrypt versions are affected?
Affected versions include releases prior to 0.3.3 across affected packages: github.com/google/fscrypt.
What version fixes GHSA-w4f8-fxq2-j35v?
Upgrading to 0.3.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/google/fscrypt affected?
Yes, github.com/google/fscrypt is affected in releases prior to 0.3.3. Upgrade your dependency to 0.3.3 or later.
What CWE is associated with GHSA-w4f8-fxq2-j35v?
GHSA-w4f8-fxq2-j35v is classified under General Security Weakness.
How can I check Go dependencies for GHSA-w4f8-fxq2-j35v?
Run the dependency tree command: 'inspect dependencies for github.com/google/fscrypt'. 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-w4f8-fxq2-j35v",
  "modified" : "2022-03-01T21:04:57Z",
  "published" : "2022-03-01T21:04:57Z",
  "aliases" : [ ],
  "summary" : "Possible privilege escalation via bash completion script",
  "details" : "The bash completion script for `fscrypt` through v0.3.2 allows injection of commands via crafted mountpoint paths, allowing privilege escalation under a specific set of circumstances. A local user who has control over mountpoint paths could potentially escalate their privileges if they create a malicious mountpoint path and if the system administrator happens to be using the `fscrypt` bash completion script to complete mountpoint paths. We recommend upgrading to v0.3.3 or above.\n\nFor more details, see [CVE-2022-25328](https://www.cve.org/CVERecord?id=CVE-2022-25328).",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/google/fscrypt"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.3.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/google/fscrypt/security/advisories/GHSA-w4f8-fxq2-j35v"
  }, {
    "type" : "PACKAGE",
    "url" : "github.com/google/fscrypt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-01T21:04:57Z",
    "nvd_published_at" : null
  }
}