CVE-2026-42511
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| FreeBSD | FreeBSD | 15.0-RELEASE < p7 | affected |
| FreeBSD | FreeBSD | 14.4-RELEASE < p3 | affected |
| FreeBSD | FreeBSD | 14.3-RELEASE < p12 | affected |
| FreeBSD | FreeBSD | 13.5-RELEASE < p13 | affected |
Weaknesses
- CWE-149: CWE-149: Improper Neutralization of Quoting Syntax
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
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