CVE-2022-39271: Github.com/traefik/traefik/v2 Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-c6hx-pjc3-7fqr
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CVSS 7.5
CWE-755 CWE-400
Published
Advisory Summary

CVE-2022-39271 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-755: Improper Handling of Exceptional Conditions) affecting Github.com/traefik/traefik/v2 libraries in the Go ecosystem. The issue involves traefik http/2 connections management could cause a denial of service. Remediation is available by upgrading affected packages to version 2.8.8, 2.9.0-rc5.

CVE-2022-39271 at a Glance

CVE Identifier CVE-2022-39271
GHSA Identifier GHSA-c6hx-pjc3-7fqr
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-755: Improper Handling of Exceptional Conditions
Affected Product Github.com/traefik/traefik/v2
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:N/I:N/A:H).

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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2022-39271

To remediate this vulnerability, upgrade all affected Github.com/traefik/traefik/v2 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/traefik/traefik/v2 fixed: 2.8.8 
Upgrade github.com/traefik/traefik/v2 to 2.8.8
github.com/traefik/traefik/v2 fixed: 2.9.0-rc5 
Upgrade github.com/traefik/traefik/v2 to 2.9.0-rc5
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/traefik/traefik/v2

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-39271, inspect your project dependencies for Github.com/traefik/traefik/v2:

inspect dependencies for github.com/traefik/traefik/v2

Analyze the terminal output to locate any version of Github.com/traefik/traefik/v2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.8.8), 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-755: Improper Handling of Exceptional Conditions, where the product does not handle or incorrectly handles an exceptional condition. In Github.com/traefik/traefik/v2, 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 There is a potential vulnerability in Traefik managing HTTP/2 connections. A closing HTTP/2 server connection could hang forever because of a subsequent fatal error. This failure mode could be exploited to cause a denial of service. ### Patches Traefik v2.8.x: https://github.com/traefik/traefik/releases/tag/v2.8.8 Traefik v2.9.x: https://github.com/traefik/traefik/releases/tag/v2.9.0-rc5 ### Workarounds No workaround. ### For more information If you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).

CVE-2022-39271 Affected Github.com/traefik/traefik/v2 Versions

2 component(s)
Fixed Versions:
2.8.82.9.0-rc5
Product / Package Ecosystem Affected Versions Fixed Version
github.com/traefik/traefik/v2
golang/github.com/traefik/traefik/v2
Go
< 2.8.8
2.8.8
github.com/traefik/traefik/v2
golang/github.com/traefik/traefik/v2
Go
≥ 2.9.0-rc1
< 2.9.0-rc5
2.9.0-rc5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/traefik/traefik/security/advisories/GHSA-c6hx-pjc3-7fqr
NVD — CVE-2022-39271 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-39271
Github.com/traefik/traefik/v2 Source Repository REPOSITORY
https://github.com/traefik/traefik
Github.com/traefik/traefik/v2 Release RELEASE
https://github.com/traefik/traefik/releases/tag/v2.8.8
Github.com/traefik/traefik/v2 Release RELEASE
https://github.com/traefik/traefik/releases/tag/v2.9.0-rc5

Frequently Asked Questions

What is CVE-2022-39271?
CVE-2022-39271 is a security vulnerability in Github.com/traefik/traefik/v2 involving Traefik HTTP/2 connections management could cause a denial of service under CWE-755: Improper Handling of Exceptional Conditions.
Which Github.com/traefik/traefik/v2 versions are affected?
Affected versions include releases prior to 2.8.8, 2.9.0-rc5 across affected packages: github.com/traefik/traefik/v2.
What version fixes CVE-2022-39271?
Upgrading to 2.8.8, 2.9.0-rc5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/traefik/traefik/v2 affected?
Yes, github.com/traefik/traefik/v2 is affected in releases prior to 2.8.8, 2.9.0-rc5. Upgrade your dependency to 2.8.8, 2.9.0-rc5 or later.
What is the CVSS score of CVE-2022-39271?
CVE-2022-39271 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:N/I:N/A:H.
What CWE is associated with CVE-2022-39271?
CVE-2022-39271 is classified under CWE-755: Improper Handling of Exceptional Conditions (The product does not handle or incorrectly handles an exceptional condition.).
How can I check Go dependencies for CVE-2022-39271?
Run the dependency tree command: 'inspect dependencies for github.com/traefik/traefik/v2'. 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-c6hx-pjc3-7fqr",
  "modified" : "2022-10-13T20:08:57Z",
  "published" : "2022-10-10T21:23:30Z",
  "aliases" : [ "CVE-2022-39271" ],
  "summary" : "Traefik HTTP/2 connections management could cause a denial of service",
  "details" : "### Impact\n\nThere is a potential vulnerability in Traefik managing HTTP/2 connections.\nA closing HTTP/2 server connection could hang forever because of a subsequent fatal error. This failure mode could be exploited to cause a denial of service.\n\n### Patches\n\nTraefik v2.8.x: https://github.com/traefik/traefik/releases/tag/v2.8.8\nTraefik v2.9.x: https://github.com/traefik/traefik/releases/tag/v2.9.0-rc5\n\n### Workarounds\n\nNo workaround.\n\n### For more information\n\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/traefik/traefik/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.8.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/traefik/traefik/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.9.0-rc1"
      }, {
        "fixed" : "2.9.0-rc5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/security/advisories/GHSA-c6hx-pjc3-7fqr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-39271"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/traefik/traefik"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/releases/tag/v2.8.8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/releases/tag/v2.9.0-rc5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-755" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-10-10T21:23:30Z",
    "nvd_published_at" : "2022-10-11T14:15:00Z"
  }
}