Vulnerabilities in pkg:golang/github.com/valyala/fasthttp

PACKAGE
Advisory Identifier: GHSA-fx95-883v-4q4h
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Advisory Summary

CVE-2022-21221 is a HIGH (CVSS 7.5) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Github.com/valyala/fasthttp libraries in the Go ecosystem. The issue involves path traversal in github.com/valyala/fasthttp. Remediation is available by upgrading affected packages to version 1.34.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/github.com/valyala/fasthttp

1 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-fx95-883v-4q4h CVE-2022-21221 HIGH Path traversal in github.com/valyala/fasthttp

CVE-2022-21221 at a Glance

CVE Identifier CVE-2022-21221
GHSA Identifier GHSA-fx95-883v-4q4h
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Github.com/valyala/fasthttp
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: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-2022-21221

To remediate this vulnerability, upgrade all affected Github.com/valyala/fasthttp 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/valyala/fasthttp fixed: 1.34.0 
Upgrade github.com/valyala/fasthttp to 1.34.0
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/valyala/fasthttp

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-21221, inspect your project dependencies for Github.com/valyala/fasthttp:

inspect dependencies for github.com/valyala/fasthttp

Analyze the terminal output to locate any version of Github.com/valyala/fasthttp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.34.0), 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Github.com/valyala/fasthttp, 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 package github.com/valyala/fasthttp before 1.34.0 is vulnerable to Directory Traversal via the ServeFile function, due to improper sanitization. It is possible to be exploited by using a backslash %5c character in the path. **Note:** This security issue impacts Windows users only.

CVE-2022-21221 Affected Github.com/valyala/fasthttp Versions

1 component(s)
Fixed Versions:
1.34.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/valyala/fasthttp
golang/github.com/valyala/fasthttp
Go
< 1.34.0
1.34.0

References

NVD — CVE-2022-21221 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-21221
Github.com/valyala/fasthttp Source Repository REPOSITORY
https://github.com/valyala/fasthttp/issues/1226
Security Fix Commit FIX COMMIT
https://github.com/valyala/fasthttp/commit/15262ecf3c602364639d465daba1e7f3604d00e8
Security Fix Commit FIX COMMIT
https://github.com/valyala/fasthttp/commit/6b5bc7bb304975147b4af68df54ac214ed2554c1
Github.com/valyala/fasthttp Source Repository REPOSITORY
https://github.com/valyala/fasthttp
Github.com/valyala/fasthttp Release RELEASE
https://github.com/valyala/fasthttp/releases/tag/v1.34.0
pkg.go.dev/vuln/go-2022-0355 WEB
https://pkg.go.dev/vuln/GO-2022-0355
snyk.io/vuln/snyk-golang-gi... WEB
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMVALYALAFASTHTTP-2407866

Frequently Asked Questions

What is CVE-2022-21221?
CVE-2022-21221 is a security vulnerability in Github.com/valyala/fasthttp involving Path traversal in github.com/valyala/fasthttp under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Github.com/valyala/fasthttp versions are affected?
Affected versions include releases prior to 1.34.0 across affected packages: github.com/valyala/fasthttp.
What version fixes CVE-2022-21221?
Upgrading to 1.34.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/valyala/fasthttp affected?
Yes, github.com/valyala/fasthttp is affected in releases prior to 1.34.0. Upgrade your dependency to 1.34.0 or later.
What is the CVSS score of CVE-2022-21221?
CVE-2022-21221 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-2022-21221?
CVE-2022-21221 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Go dependencies for CVE-2022-21221?
Run the dependency tree command: 'inspect dependencies for github.com/valyala/fasthttp'. 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-fx95-883v-4q4h",
  "modified" : "2024-05-20T20:47:46Z",
  "published" : "2022-03-18T00:01:11Z",
  "aliases" : [ "CVE-2022-21221" ],
  "summary" : "Path traversal in github.com/valyala/fasthttp",
  "details" : "The package github.com/valyala/fasthttp before 1.34.0 is vulnerable to Directory Traversal via the ServeFile function, due to improper sanitization. It is possible to be exploited by using a backslash %5c character in the path. **Note:** This security issue impacts Windows users only.",
  "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" : "Go",
      "name" : "github.com/valyala/fasthttp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.34.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-21221"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/valyala/fasthttp/issues/1226"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/valyala/fasthttp/commit/15262ecf3c602364639d465daba1e7f3604d00e8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/valyala/fasthttp/commit/6b5bc7bb304975147b4af68df54ac214ed2554c1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/valyala/fasthttp"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/valyala/fasthttp/releases/tag/v1.34.0"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2022-0355"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMVALYALAFASTHTTP-2407866"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-18T22:58:55Z",
    "nvd_published_at" : "2022-03-17T12:15:00Z"
  }
}