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Insert a index position check before getting bytes

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ekleezg
2025-05-20 14:19:56 +09:00
parent cd34ed2ab2
commit adbb3a231a
1 changed files with 6 additions and 0 deletions
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6
addons/dhcp/nxd_dhcpv6_client.c
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@@ -5811,6 +5811,12 @@ ULONG temp_lsw = 0;
index += 4;
}
/* Check option length for 4 bytes lsw. */
if (index + 4 > option_length)
{
return(NX_DHCPV6_INVALID_SERVER_DUID);
}
/* Yes; Extract the link local address lsw which should be the next 4 bytes. */
_nx_dhcpv6_utility_get_data((option_data + index), 4, &temp_lsw);