| शीर्षक | dnsmasq dnsmasq v2.73rc6 Heap-based Buffer Overflow |
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| विवरण | 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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| स्रोत | ⚠️ https://shimo.im/docs/1d3aMVMmNmiLjg3g/ |
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| उपयोगकर्ता | zh_vul (UID 91488) |
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| सबमिशन | 11/10/2025 05:30 AM (12 महीनों पहले) |
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| संयम | 25/10/2025 08:22 AM (14 days later) |
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| स्थिति | स्वीकृत |
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| VulDB प्रविष्टि | 329868 [dnsmasq तक 2.73rc6 Config File src/util.c parse_hex i बफ़र ओवरफ़्लो] |
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| अंक | 20 |
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