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Security Advisories: GSA_kwCzR0hTQS05cnB3LTJoOTUtNjY2Y84AAvJs

Cloudflare GoFlow vulnerable to a Denial of Service in the sflow packet handling package

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:

Permalink: https://github.com/advisories/GHSA-9rpw-2h95-666c
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS05cnB3LTJoOTUtNjY2Y84AAvJs
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: about 2 years ago
Updated: about 1 year ago


CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Percentage: 0.00074
EPSS Percentile: 0.34193

Identifiers: GHSA-9rpw-2h95-666c, CVE-2022-2529
References: Repository: https://github.com/cloudflare/goflow
Blast Radius: 5.8

Affected Packages

go:github.com/cloudflare/goflow/v3
Dependent packages: 12
Dependent repositories: 6
Downloads:
Affected Version Ranges: < 3.4.4
Fixed in: 3.4.4
All affected versions: 3.0.1, 3.0.2, 3.0.3, 3.1.0, 3.2.0, 3.3.0, 3.4.0, 3.4.1, 3.4.2, 3.4.3
All unaffected versions: 3.4.4, 3.4.5