Falhas do tipo CWE-120

3.163 resultados

Estouro de buffer clássico

A aplicação copia dados em um buffer sem validar o tamanho, permitindo que um atacante sobrescreva memória adjacente. Isso pode corromper variáveis, desviar o fluxo de execução ou injetar código malicioso que será executado com os mesmos privilégios da aplicação.

Exemplo

Um formulário web aceita um nome de usuário e o copia direto em um array de 32 bytes sem checar comprimento. Um atacante envia 200 bytes; o excesso sobrescreve o endereço de retorno da função, desviando a execução para código dele. Comum em CGI antigos, serviços network e binários C/C++ mal escritos.

Como mitigar

Use funções seguras (strncpy, strlcpy em vez de strcpy; snprintf em vez de sprintf) que respeitam limites. Sempre valide e sanitize entrada externa antes de copiar. Em C moderno, considere AddressSanitizer ou ferramentas estáticas para detectar cópias inseguras em tempo de compilação.

CVE-2019-5063HIGHAn exploitable heap buffer overflow vulnerability exists in the data structure persistence functionality of OpenCV 4.1.0. A specially crafteEPSS 21.1%CVE-2024-29671CRITICALBuffer Overflow vulnerability in NEXTU FLATA AX1500 Router v.1.0.2 allows a remote attacker to execute arbitrary code via the POST request hEPSS 20.9%CVE-2021-22802—A CWE-120: Buffer Copy without Checking Size of Input vulnerability exists that could result in remote code execution due to missing length EPSS 20.2%CVE-2020-8597CRITICALeap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions.EPSS 19.9%CVE-2023-27853CRITICALNETGEAR Nighthawk WiFi6 Router prior to V1.0.10.94 contains a format string vulnerability in a SOAP service that could allow an attacker to EPSS 19.7%CVE-2019-8287—TightVNC code version 1.3.10 contains global buffer overflow in HandleCoRREBBP macro function, which can potentially result code execution. EPSS 19.5%CVE-2022-43970HIGHBuffer overflow in Linksys WRT54GLEPSS 19.3%CVE-2022-37434CRITICALzlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header extra field. NOTE: EPSS 17.9%CVE-2024-7828HIGHD-Link DNS-1550-04 photocenter_mgr.cgi cgi_set_cover buffer overflowEPSS 16.2%CVE-2024-42812CRITICALIn D-Link DIR-860L v2.03, there is a buffer overflow vulnerability due to the lack of length verification for the SID field in gena.cgi. AttEPSS 15.5%CVE-2025-5548MEDIUMFreeFloat FTP Server NOOP Command buffer overflowEPSS 15.0%CVE-2010-0820HIGHHeap-based buffer overflow in the Local Security Authority Subsystem Service (LSASS), as used in Active Directory in Microsoft Windows ServeEPSS 14.4%CVE-2021-22824—A CWE-120: Buffer Copy without Checking Size of Input vulnerability exists that could result in denial of service, due to missing length cheEPSS 14.2%CVE-2023-34563CRITICALnetgear R6250 Firmware Version 1.0.4.48 is vulnerable to Buffer Overflow after authentication.EPSS 13.7%CVE-2023-31475CRITICALAn issue was discovered on GL.iNet devices before 3.216. The function guci2_get() found in libglutil.so has a buffer overflow when an item iEPSS 13.7%CVE-2023-7095CRITICALTotolink A7100RU HTTP POST Request main buffer overflowEPSS 13.7%CVE-2019-17147HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication EPSS 13.7%CVE-2024-39288CRITICALA buffer overflow vulnerability exists in the internet.cgi set_add_routing() functionality of Wavlink AC3000 M33A8.V5030.210505. A speciallyEPSS 13.5%CVE-2022-22805—A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability exists that could cause remote code executioEPSS 11.9%CVE-2025-5905HIGHTOTOLINK T10 POST Request cstecgi.cgi setWiFiRepeaterCfg buffer overflowEPSS 11.3%