CVE-2026-100716 CRITICAL

Mô tả

Froxlor is a server administration panel. In versions 2.3.10 and earlier, the customer data-export (DataDump) cron fails to validate intermediate path components of the export destination: Froxlor\FileDir::makeCorrectDir() contains an off-by-one in its path-component walk that skips the first segment below the customer home directory, and the guard in ExportCron.php checks only the final component with is_link(). An authenticated customer whose account has the export feature enabled can schedule an export into a genuine subdirectory of their own webspace, then replace an intermediate path component with a symlink before the root-owned cron runs. The cron's `chown -R` then recursively changes ownership of the linked directory tree — for example /etc — to the customer's UID, yielding host root and cross-tenant compromise. Exploitation is deterministic and requires no race. This is an incomplete fix of GHSA-75h4-... The issue is fixed in Froxlor 2.3.12.

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Tài liệu tham khảo

• [disclosure@vulncheck.com] https://github.com/froxlor/froxlor/security/advisories/GHSA-2wjc-6mgx-hq42
• [disclosure@vulncheck.com] https://www.vulncheck.com/advisories/froxlor-before-2.3.12-privilege-escalation-via-symlink
• [134c704f-9b21-4f2e-91b3-4a467353bcc0] https://github.com/froxlor/froxlor/security/advisories/GHSA-2wjc-6mgx-hq42

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