dhcpoptinj

DHCP 选项注入器 你是否曾想截获 DHCP 请求，并在发送者不知情的情况下悄悄塞入几个额外的 DHCP 选项？大概率没有。不过，如果真有此需要，dhcpoptinj 将（但愿能）帮到你。 为什么 篡改 DHCP 请求的原因可以有很多，尽管更可能的是你应该寻找一个更好的方法来解决你的问题。也许你无法访问 DHCP 服务器/客户端，却需要修改它们的 DHCP 选项；也许 DHCP 软件难以配置（或不支持你需要做的事情）；也许你有一个非常复杂和/或特殊的设置；又或者你只是想尝试发送畸形或错误格式的选项？dhcoptinj 还是有一点点可能真的派上用场。 如何工作 dhcpoptinj...

CVE-2026-11834

CVE-2026-11834 PoC TP-Link DHCP Option 66 未认证远程代码执行（CVE-2026-11834） 概述 TP-Link 路由器固件在处理 DHCP Option 66（“TFTP 服务器名”）时存在命令注入漏洞（CWE-78），同一网段内的未认证攻击者可利用该漏洞以 root 权限执行任意命令。当设备在 WAN 接口上充当 DHCP 客户端时，租约中返回的 Option 66 值未经净化即被拼接进 libcmm.so 中的 tftp shell 命令。共有五个函数构造该命令并将其传递给 utilexecSystem，后者调用 system，因此精心构...

CVE-2026-9997-VPN-Split-Tunneling-Bypass-via-DHCP-Option-Injection

CVE-2026-9997 – 通过 DHCP 选项注入绕过 VPN 分流隧道 程序代码（Python 模拟 DHCP 服务器 + 客户端） root@kitploit: !/usr/bin/env python3 roguedhcpserver.py - Injects a static route to bypass VPN split tunnel import socket, struct, threading def senddhcpofferclientmac, offerip: Craft a DHCP OFFER packet with Option 121...

freebsd-dhclient-poc

CVE-2020-7461 重现 PoC 作者: Moshe Kol, Shlomi Oberman 用于 FreeBSD dhclient 在解析 DHCP 选项 119 CVE-2020-7461 时堆缓冲区溢出漏洞的重现 PoC。 问题出在文件 sbin/dhclient/options.c 中的函数 findsearchdomainnamelen 中。 当服务器提供 DHCP 选项 119（域搜索，RFC 3397）时，expanddomainsearch 调用此函数。 当使用压缩方案时，函数 findsearchdomainnamelen...

Security update for wicked (important)

openSUSE security update: security update for wicked ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:21669-1 Rating: important References: bsc1274627 Cross-References: CVE-2026-71401 CVE-2026-71402 CVSS scores: CVE-2026-71401 SUSE : 7.5...

OPENSUSE-SU-2026:21669-1 Security update for wicked

This update for wicked fixes the following issues: Changes in wicked: - Fix two OOB reads in nicaptureinspectudpheader and improve: - Reject packets with iplen ihl to avoid a sizet underflow of the UDP length, which the checksum truncates to uint16t bsc1274627, CVE-2026-71401. - Set payloadlen to...

SUSE-SU-2026:2720-1 Security update for dracut

This update for dracut fixes the following issue - CVE-2026-6893: Root code execution via DHCP options command injection bsc1268322. Changes for dracut: - Update to version 055+suse.365.g79144c5: fixnetwork-legacy: sanitize DHCP values in dhclient-script.sh bsc1268322, CVE-2026-6893...

Exploit for CVE-2026-11834

CVE-2026-11834 PoC TP-Link DHCP Option 66 Unauthenticated RC...

CVE-2026-11834

A command injection vulnerability has been identified in the DHCP option processing logic in multiple TP-Link router models, due to insufficient validation of externally supplied DHCP option data. An adjacent attacker may exploit this vulnerability by supplying crafted DHCP responses, potentially...

CVE-2026-11834 Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers

A command injection vulnerability has been identified in the DHCP option processing logic in multiple TP-Link router models, due to insufficient validation of externally supplied DHCP option data. An adjacent attacker may exploit this vulnerability by supplying crafted DHCP responses, potentially...

EUVD-2026-38339

A command injection vulnerability has been identified in the DHCP option processing logic in multiple TP-Link router models, due to insufficient validation of externally supplied DHCP option data. An adjacent attacker may exploit this vulnerability by supplying crafted DHCP responses, potentially...

CVE-2025-70102

A NULL pointer dereference occurs in Roy Marples NetworkConfiguration/dhcpcd 10.3.0 while parsing configuration options. In parseoption src/if-options.c:1886, the code performs a member access on a NULL pointer of type 'struct dhcpopt' when an unexpected/invalid option token or parsing state caus...

CVE-2025-70102

A NULL pointer dereference occurs in Roy Marples NetworkConfiguration/dhcpcd 10.3.0 while parsing configuration options. In parseoption src/if-options.c:1886, the code performs a member access on a NULL pointer of type 'struct dhcpopt' when an unexpected/invalid option token or parsing state caus...

CVE-2025-70102

A NULL pointer dereference occurs in Roy Marples NetworkConfiguration/dhcpcd 10.3.0 while parsing configuration options. In parseoption src/if-options.c:1886, the code performs a member access on a NULL pointer of type 'struct dhcpopt' when an unexpected/invalid option token or parsing state caus...

CVE-2026-45160 ESF-IDF: Out-of-bounds Read in lwIP DHCP Server Option Parser

ESF-IDF is the Espressif Internet of Things IOT Development Framework. In versions 5.2.7, 5.3.5, 5.4.4, 5.5.4, and 6.0.1, an out-of-bounds read flaw exists in the DHCP server option parser parseoptions in components/lwip/apps/dhcpserver/dhcpserver.c shipped with ESP-IDF's lwIP component. The pars...

ESP-IDF 缓冲区错误漏洞

ESP-IDF is an open-source development framework for Espressif’s SoCs, supported on Windows, Linux, and macOS. Versions 5.2.7, 5.3.5, 5.4.4, 5.5.4, and 6.0.1 of ESP-IDF contain buffer overflow vulnerabilities. These vulnerabilities stem from an out-of-bounds read issue in the DHCP server option...

CVE-2026-34960 barebox Out-of-Bounds Read in DHCP Option Parsing

barebox prior to version 2026.04.0 contains an out-of-bounds read vulnerability in DHCP option parsing within the dhcpmessagetype function that fails to verify the options pointer remains within received packet bounds. An attacker on the same broadcast domain can send a crafted DHCP Offer or ACK...

CVE-2026-34960 barebox Out-of-Bounds Read in DHCP Option Parsing

barebox prior to version 2026.04.0 contains an out-of-bounds read vulnerability in DHCP option parsing within the dhcpmessagetype function that fails to verify the options pointer remains within received packet bounds. An attacker on the same broadcast domain can send a crafted DHCP Offer or ACK...

CLSA-2026-1776960429 busybox: Fix of 4 CVEs

CVE-2018-1000517: fix heap buffer overflow in wget chunked decoding - CVE-2017-16544: reject terminal control sequences in shell tab completion - CVE-2018-20679: reject zero-length DHCP options and validate 4-byte option lengths - CVE-2019-5747: validate DHCPSUBNET option length before decoding...

busybox: Fix of 4 CVEs

CVE-2018-1000517: fix heap buffer overflow in wget chunked decoding - CVE-2017-16544: reject terminal control sequences in shell tab completion - CVE-2018-20679: reject zero-length DHCP options and validate 4-byte option lengths - CVE-2019-5747: validate DHCPSUBNET option length before decoding...