CVE-2026-42511
Discovered by AISLEPUBLISHEDCWE-149
Description
The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives. When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it. A rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.
CVSS Base Scores
CVSS v3.1(Primary)
8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| FreeBSD | FreeBSD | 15.0-RELEASE | affected |
| FreeBSD | FreeBSD | 14.4-RELEASE | — |
| FreeBSD | FreeBSD | 14.3-RELEASE | — |
| FreeBSD | FreeBSD | 13.5-RELEASE | — |
Credits
- Joshua Rogers of AISLE Research Team(finder)