Submeter #520183: Open Source libgsf <=1.14.53 Integer Overflow -> Heap Overflow (gsf_property_settings_collec)

The vulnerability arises from unchecked arithmetic during the dynamic expansion of the parameters array—adding 16 to n_alloced_params near SIZE_MAX can overflow, leading to underallocation and potential out-of-bounds writes to heap memory.

void
gsf_property_settings_collect_valist (GType object_type,
GParameter **p_params,
size_t *p_n_params,
const gchar *first_property_name,
va_list var_args)
{
...
size_t n_params = *p_n_params;
size_t n_alloced_params = n_params;
...
while (name)
{
...
if (n_params >= n_alloced_params)
{
n_alloced_params += 16; // If n_alloced_params is near SIZE_MAX, adding 16 may overflow.
params = g_renew (GParameter, params, n_alloced_params); // underallocation as a result fof the arithmetic
}
params[n_params].name = name; //the 'write' logic, could attempt to derference an offset that isn't mapped, or write to arbitrary addresses on the heap
...
n_params++; // another incrementation vector that could lead to an overflow in theory
...
}
...
}

• Utilizador: ninpwn (UID 82253)
• Submissão: 13/03/2025 21h22 (há 1 Ano)
• Moderação: 24/03/2025 13h46 (11 days later)
• Estado: Aceite
• Entrada VulDB: 300743 [GNOME libgsf até 1.14.53 gsf_property_settings_collec n_alloced_params Excesso de tampão]
• Pontos: 17