Fallos del tipo CWE-476

2329 resultados

Desreferência de ponteiro nulo autenticada remota

A aplicação tenta acessar um objeto ou endereço de memória que não foi inicializado ou foi definido como nulo, sem verificar essa condição antes. Um atacante autenticado consegue provocar esse acesso inválido enviando dados malformados ou inesperados, causando crash ou comportamento indefinido.

Ejemplo

Um endpoint autenticado de API recebe um ID de usuário, faz uma busca no banco que retorna nulo (usuário não existe) e tenta acessar diretamente campos desse objeto nulo sem validação — resultando em erro 500 ou travamento da aplicação.

Cómo mitigar

Sempre verificar se um objeto é nulo antes de usá-lo; usar análise estática (linters, SAST) para detectar acessos potenciais a nulos; validar e tratar casos onde dados esperados podem estar ausentes, mesmo que o usuário esteja autenticado.

CVE-2024-37890HIGHDenial of service when handling a request with many HTTP headers in wsEPSS 1.4%CVE-2023-32171MEDIUMUnified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service VulnerabilityEPSS 1.4%CVE-2023-2617MEDIUMOpenCV wechat_qrcode Module decoded_bit_stream_parser.cpp decodeByteSegment null pointer dereferenceEPSS 1.4%CVE-2021-23180—A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary codeEPSS 1.4%CVE-2026-63076HIGHInvalid Pointer Dereference in CMP Server via Crafted protectionAlgEPSS 1.4%CVE-2011-1231HIGHwin32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows ServeEPSS 1.3%CVE-2022-20746HIGHCisco Firepower Threat Defense Software TCP Proxy Denial of Service VulnerabilityEPSS 1.3%CVE-2019-14878MEDIUMIn the __d2b function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate aEPSS 1.3%CVE-2019-14877MEDIUMIn the __mdiff function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocateEPSS 1.3%CVE-2019-14876MEDIUMIn the __lshift function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocatEPSS 1.3%CVE-2019-14874MEDIUMIn the __i2b function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate aEPSS 1.3%CVE-2009-2516HIGHThe kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold and SP1, and Server 2008 Gold does not properly validaEPSS 1.3%CVE-2021-40778MEDIUMAdobe Media Encoder Null Pointer Dereference Application denial-of-serviceEPSS 1.3%CVE-2021-40781MEDIUMAdobe Media Encoder Null Pointer Dereference Application denial-of-serviceEPSS 1.3%CVE-2021-40750MEDIUMAdobe Bridge NULL Pointer Dereference could lead to Application denial-of-serviceEPSS 1.3%CVE-2011-1881HIGHwin32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows ServeEPSS 1.3%CVE-2021-34737MEDIUMCisco IOS XR Software DHCP Version 4 Server Denial of Service VulnerabilityEPSS 1.3%CVE-2022-43603MEDIUMA denial of service vulnerability exists in the ZfileOutput::close() functionality of OpenImageIO Project OpenImageIO v2.4.4.2. A specially EPSS 1.3%CVE-2022-43593MEDIUMA denial of service vulnerability exists in the DPXOutput::close() functionality of OpenImageIO Project OpenImageIO v2.4.4.2. A specially crEPSS 1.3%CVE-2026-1584HIGHGnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binderEPSS 1.3%