{"id":"CVE-2025-27591","aliases":["GHSA-9mc5-7qhg-fp3w","RUSTSEC-2025-0149"],"url":"https://o3.security/vulnerability/CVE-2025-27591","summary":"Below has Incorrect Permission Assignment for Critical Resource","details":"### Impact\nA 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.\n\n### Patches\nhttps://github.com/facebookincubator/below/commit/10e73a21d67baa2cd613ee92ce999cda145e1a83\n\nThis is included in version 0.9.0\n\n### Workarounds\nChange the permission on `/var/log/below` manually\n\n### References\nhttps://www.facebook.com/security/advisories/cve-2025-27591\nhttps://www.cve.org/CVERecord?id=CVE-2025-27591","published":"2025-03-11T18:29:21.569Z","modified":"2026-08-12T03:51:33.312768728Z","cvss":{"score":6.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":7,"affectedPackages":[{"ecosystem":"crates.io","name":"below","fixedVersion":"0.9.0"}],"fix":{"url":"https://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3","label":"facebookincubator/below@da9382e"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/03/12/1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27591.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27591"},{"type":"ADVISORY","url":"https://www.facebook.com/security/advisories/cve-2025-27591"},{"type":"FIX","url":"https://github.com/facebookincubator/below/commit/da9382e6e3e332fd2c3195e22f34977f83f0f1f3"},{"type":"WEB","url":"https://github.com/facebookincubator/below/security/advisories/GHSA-9mc5-7qhg-fp3w"},{"type":"WEB","url":"https://github.com/facebookincubator/below/commit/10e73a21d67baa2cd613ee92ce999cda145e1a83"},{"type":"PACKAGE","url":"https://github.com/facebookincubator/below"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2025-0149.html"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2025/03/12/1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:33.312768728Z"}}