| Название | dnsmasq dnsmasq v2.73rc6 Heap-based Buffer Overflow |
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| Описание | A heap buffer overflow exists in dnsmasq v2.73rc6 when parsing DHCP option hexadecimal values. The vulnerability is in `parse_hex()` (src/util.c) which can write past the end of the allocated buffer (callers allocate based on a computed byte count). A crafted DHCP option in `dnsmasq.conf` causes `parse_hex()` to overflow the heap buffer during configuration parsing, resulting in a crash and potential memory corruption. Reproduce by replacing `dnsmasq.conf` with the supplied config and starting dnsmasq; an ASan build produces a reliable crash referencing `parse_hex`. |
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| Источник | ⚠️ https://shimo.im/docs/1d3aMVMmNmiLjg3g/ |
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| Пользователь | zh_vul (UID 91488) |
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| Представление | 11.10.2025 05:30 (8 месяцы назад) |
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| Модерация | 25.10.2025 08:22 (14 days later) |
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| Статус | принято |
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| Запись VulDB | 329868 [dnsmasq до 2.73rc6 Config File src/util.c parse_hex i повреждение памяти] |
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| Баллы | 20 |
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