high7.8
CVE-2025-27591
Below has Incorrect Permission Assignment for Critical Resource
Impact
### 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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | below | < 0.9.0 | 0.9.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Below | before 0.9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3
- https://www.facebook.com/security/advisories/cve-2025-27591
- http://www.openwall.com/lists/oss-security/2025/03/12/1
- https://github.com/advisories/GHSA-9mc5-7qhg-fp3w
- https://github.com/facebookincubator/below/security/advisories/GHSA-9mc5-7qhg-fp3w
- https://github.com/facebookincubator/below/commit/10e73a21d67baa2cd613ee92ce999cda145e1a83
- https://nvd.nist.gov/vuln/detail/CVE-2025-27591
- https://rustsec.org/advisories/RUSTSEC-2025-0149.html
- https://www.openwall.com/lists/oss-security/2025/03/12/1