GHSA-9mc5-7qhg-fp3w
First published: Tue Mar 11 2025(Updated: )
### Impact A privilege escalation vulnerability existed in the Below service prior to v0.9.0 due to the creation of a world-writable directory at /var/log/below. This could have allowed local unprivileged users to escalate to root privileges through symlink attacks that manipulate files such as /etc/shadow. ### Patches https://github.com/facebookincubator/below/commit/10e73a21d67baa2cd613ee92ce999cda145e1a83 This is included in version 0.9.0 ### Workarounds Change the permission on `/var/log/below` manually ### References https://www.facebook.com/security/advisories/cve-2025-27591 https://www.cve.org/CVERecord?id=CVE-2025-27591
| Affected Software | Affected Version | How to fix |
|---|---|---|
| rust/below | <0.9.0 | 0.9.0 |
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Reference Links
Frequently Asked Questions
What is the severity of GHSA-9mc5-7qhg-fp3w?
GHSA-9mc5-7qhg-fp3w is a privilege escalation vulnerability that poses a critical security risk.
How do I fix GHSA-9mc5-7qhg-fp3w?
To fix GHSA-9mc5-7qhg-fp3w, upgrade to Below version 0.9.0 or later immediately.
Who is affected by GHSA-9mc5-7qhg-fp3w?
All users running Below versions prior to 0.9.0 are affected by GHSA-9mc5-7qhg-fp3w.
What kind of attack does GHSA-9mc5-7qhg-fp3w enable?
GHSA-9mc5-7qhg-fp3w enables local unprivileged users to escalate their privileges to root through symlink attacks.
Where is the vulnerable directory located in GHSA-9mc5-7qhg-fp3w?
The vulnerable directory created by GHSA-9mc5-7qhg-fp3w is located at /var/log/below.
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-9mc5-7qhg-fp3w
- alias/CVE-2025-27591
- agent/software-canonical-lookup
- agent/weakness
- agent/source
- agent/softwarecombine
- agent/severity
- agent/references
- agent/last-modified-date
- agent/type
- agent/description
- agent/first-publish-date
- agent/tags
- agent/event
- package-manager/rust