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Supply Chain Attack - Docker

Description

Docker dependencies are not pinned to an exact digest, making the Docker build unable the verify the integrity of the image and allowing a malicious actor to override the used components with malicious components without leaving a trace.

Impact

Override depdendencies or component with malicious content.

Recommendation

Use mechanisms such as git-commits, or artifacts and hashes to verify the data integrity.

Threat

Anonymous attacker from Internet with write access to the provider releases.

Expected Remediation Time

⌚ 15 minutes.

Score

Default score using CVSS 3.1. It may change depending on the context of the vulnerability.

Base

  • Attack vector: N
  • Attack complexity: H
  • Privileges required: N
  • User interaction: R
  • Scope: U
  • Confidentiality: N
  • Integrity: L
  • Availability: N

Temporal

  • Exploit code madurity: U
  • Remediation level: O
  • Report confidence: R

Result

  • Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:R
  • Score:
    • Base: 3.1
    • Temporal: 2.6
  • Severity:
    • Base: Low
    • Temporal: Low

Code Examples

Compliant code

All docker dependencies are pinned using secure mechanisms

FROM [email protected]:3235326357dfb65f1781dbc4df3b834546d8bf914e82cce58e6e6b676e23
ARG DEBIAN_FRONTEND=noninteractive
RUN apt update
RUN apt install -y nginx php-fpm supervisor && \
rm -rf /var/lib/apt/lists/* && \
apt clean

Non compliant code

There are docker dependencies not pinned

FROM node:12.2
RUN apk add --no-cache python g++ make
WORKDIR /app
COPY . .
RUN yarn install --production
CMD ["node", "src/index.js"]

Requirements

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