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-2020-35507—There's a flaw in bfd_pef_parse_function_stubs of bfd/pef.c in binutils in versions prior to 2.34 which could allow an attacker who is able EPSS 1.2%CVE-2021-30500—Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow attackers to execute arEPSS 1.2%CVE-2021-40773MEDIUMAdobe Prelude NULL Pointer Dereference Application Denial of ServiceEPSS 1.2%CVE-2021-40774MEDIUMAdobe Prelude NULL Pointer Dereference Application Denial of ServiceEPSS 1.2%CVE-2021-44758HIGHHeimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO acceptor via a preferred_mech_type of GSS_C_NO_OID andEPSS 1.2%CVE-2024-33600MEDIUMnscd: Null pointer crashes after notfound responseEPSS 1.2%CVE-2024-32661HIGHFreeRDP rdp_write_logon_info_v1 NULL accessEPSS 1.2%CVE-2023-24818HIGHRIOT-OS vulnerable to null pointer dereference during fragment forwardingEPSS 1.2%CVE-2021-3514—When using a sync_repl client in 389-ds-base, an authenticated attacker can cause a NULL pointer dereference using a specially crafted queryEPSS 1.2%CVE-2025-55698HIGHDirectX Graphics Kernel Denial of Service VulnerabilityEPSS 1.2%CVE-2022-1341—An issue was discovered in in bwm-ng v0.6.2. An arbitrary null write exists in get_cmdln_options() function in src/options.c.EPSS 1.2%CVE-2021-40782MEDIUMAdobe Media Encoder Null Pointer Dereference Application denial-of-serviceEPSS 1.2%CVE-2023-48697MEDIUMAzure RTOS USBX Remote Code Execution VulnerabilityEPSS 1.2%CVE-2022-41860HIGHIn freeradius, when an EAP-SIM supplicant sends an unknown SIM option, the server will try to look that option up in the internal dictionariEPSS 1.2%CVE-2023-46838HIGHLinux: netback processing of zero-length transmit fragmentEPSS 1.2%CVE-2024-27028MEDIUMspi: spi-mt65xx: Fix NULL pointer access in interrupt handlerEPSS 1.2%CVE-2026-69881HIGHWindows Internet Key Exchange (IKE) Extension Denial of Service VulnerabilityEPSS 1.2%CVE-2026-69587HIGHWindows Internet Key Exchange (IKE) Extension Denial of Service VulnerabilityEPSS 1.2%CVE-2011-0676HIGHwin32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows ServeEPSS 1.2%CVE-2011-1887HIGHwin32k.sys in the kernel-mode drivers in Microsoft Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 GEPSS 1.2%