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SCA: security update for github.com/projectcontour/contour (GHSA-5ph6-qq5x-7jwc)

high Tenable Cloud Security Plugin ID 410955

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Contour is a Kubernetes ingress controller using Envoy proxy. In Contour before version 1.17.1 a specially
 crafted ExternalName type Service may be used to access Envoy's admin interface, which Contour normally
 prevents from access outside the Envoy container. This can be used to shut down Envoy remotely (a denial
 of service), or to expose the existence of any Secret that Envoy is using for its configuration, including
 most notably TLS Keypairs. However, it *cannot* be used to get the *content* of those secrets. Since this
 attack allows access to the administration interface, a variety of administration options are available,
 such as shutting down the Envoy or draining traffic. In general, the Envoy admin interface cannot easily
 be used for making changes to the cluster, in-flight requests, or backend services, but it could be used
 to shut down or drain Envoy, change traffic routing, or to retrieve secret metadata, as mentioned above.
 The issue will be addressed in Contour v1.18.0 and a cherry-picked patch release, v1.17.1, has been
 released to cover users who cannot upgrade at this time. For more details refer to the linked GitHub
 Security Advisory. (CVE-2021-32783)

See Also

https://github.com/advisories/GHSA-5ph6-qq5x-7jwc

Plugin Details

Severity: High

ID: 410955

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.21

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:P

CVSS Score Source: CVE-2021-32783

CVSS v3

Risk Factor: High

Base Score: 8.5

Temporal Score: 7.4

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/30/2021

Vulnerability Publication Date: 7/23/2021

Reference Information

CVE: CVE-2021-32783

cwe: CWE-610