CVE-2022-2529: Github.com/cloudflare/goflow/v3 Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-9rpw-2h95-666c
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CVSS 7.5
CWE-400 CWE-20
Published
Advisory Summary

CVE-2022-2529 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Github.com/cloudflare/goflow/v3 libraries in the Go ecosystem. The issue involves cloudflare goflow vulnerable to a denial of service in the sflow packet handling package. Remediation is available by upgrading affected packages to version 3.4.4.

CVE-2022-2529 at a Glance

CVE Identifier CVE-2022-2529
GHSA Identifier GHSA-9rpw-2h95-666c
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Github.com/cloudflare/goflow/v3
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-2022-2529

To remediate this vulnerability, upgrade all affected Github.com/cloudflare/goflow/v3 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/goflow/v3 fixed: 3.4.4 
Upgrade github.com/cloudflare/goflow/v3 to 3.4.4
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/goflow/v3

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-2529, inspect your project dependencies for Github.com/cloudflare/goflow/v3:

inspect dependencies for github.com/cloudflare/goflow/v3

Analyze the terminal output to locate any version of Github.com/cloudflare/goflow/v3 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.4.4), 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Github.com/cloudflare/goflow/v3, 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 The sflow decode package prior to version 3.4.4 does not employ sufficient packet sanitisation which can lead to a denial of service attack. Attackers can craft malformed packets causing the process to consume huge amounts of memory resulting in a denial of service. ### Specific Go Packages Affected github.com/cloudflare/goflow/v3/decoders/sflow ### Patches Version 3.4.4 contains patches fixing this. ### Workarounds A possible workaround is to not have your goflow collector publicly reachable. ### For more information If you have any questions or comments about this advisory: * Open an issue in [goflow repo](https://github.com/cloudflare/goflow) * Email us [netdev[@]cloudflare.com ](mailto:netdev@cloudflare.com)

CVE-2022-2529 Affected Github.com/cloudflare/goflow/v3 Versions

1 component(s)
Fixed Versions:
3.4.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/cloudflare/goflow/v3
golang/github.com/cloudflare/goflow/v3
Go
< 3.4.4
3.4.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/cloudflare/goflow/security/advisories/GHSA-9rpw-2h95-666c
NVD — CVE-2022-2529 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-2529
Security Fix Commit FIX COMMIT
https://github.com/cloudflare/goflow/commit/2b94619a6204443e3ca1769f4e459f9f57039c51
Security Fix Commit FIX COMMIT
https://github.com/cloudflare/goflow/commit/c829ccd2c0aafdc9b886b20bf6f28095607f4998
Github.com/cloudflare/goflow/v3 Source Repository REPOSITORY
https://github.com/cloudflare/goflow
Github.com/cloudflare/goflow/v3 Release RELEASE
https://github.com/cloudflare/goflow/releases/tag/v3.4.4

Frequently Asked Questions

What is CVE-2022-2529?
CVE-2022-2529 is a security vulnerability in Github.com/cloudflare/goflow/v3 involving Cloudflare GoFlow vulnerable to a Denial of Service in the sflow packet handling package under CWE-400: Uncontrolled Resource Consumption.
Which Github.com/cloudflare/goflow/v3 versions are affected?
Affected versions include releases prior to 3.4.4 across affected packages: github.com/cloudflare/goflow/v3.
What version fixes CVE-2022-2529?
Upgrading to 3.4.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/cloudflare/goflow/v3 affected?
Yes, github.com/cloudflare/goflow/v3 is affected in releases prior to 3.4.4. Upgrade your dependency to 3.4.4 or later.
What is the CVSS score of CVE-2022-2529?
CVE-2022-2529 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-2022-2529?
CVE-2022-2529 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check Go dependencies for CVE-2022-2529?
Run the dependency tree command: 'inspect dependencies for github.com/cloudflare/goflow/v3'. 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-9rpw-2h95-666c",
  "modified" : "2023-10-02T11:20:15Z",
  "published" : "2022-10-01T15:52:23Z",
  "aliases" : [ "CVE-2022-2529" ],
  "summary" : "Cloudflare GoFlow vulnerable to a Denial of Service in the sflow packet handling package",
  "details" : "### Impact\nThe sflow decode package prior to version 3.4.4 does not employ sufficient packet sanitisation which can lead to a denial of service attack. Attackers can craft malformed packets causing the process to consume huge amounts of memory resulting in a denial of service.\n\n### Specific Go Packages Affected\ngithub.com/cloudflare/goflow/v3/decoders/sflow\n\n### Patches\nVersion 3.4.4 contains patches fixing this.\n\n### Workarounds\nA possible workaround is to not have your goflow collector publicly reachable.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [goflow repo](https://github.com/cloudflare/goflow)\n* Email us [netdev[@]cloudflare.com ](mailto:netdev@cloudflare.com)\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/cloudflare/goflow/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.4.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/goflow/security/advisories/GHSA-9rpw-2h95-666c"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-2529"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/goflow/commit/2b94619a6204443e3ca1769f4e459f9f57039c51"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/goflow/commit/c829ccd2c0aafdc9b886b20bf6f28095607f4998"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cloudflare/goflow"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cloudflare/goflow/releases/tag/v3.4.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-10-01T15:52:23Z",
    "nvd_published_at" : "2022-09-30T11:15:00Z"
  }
}