Weaknesses of type CWE-476

2,329 results

Desreferência de nulo autenticada remota

A aplicação não valida corretamente se um ponteiro ou referência é nulo antes de usá-lo, permitindo que um usuário autenticado remotamente forneça entrada que causa uma desreferência de nulo. O resultado é um crash da aplicação ou, em cenários mais graves, execução de código não prevista, dependendo de como a memória é tratada.

Example

Um endpoint de API autenticada que busca um usuário por ID, mas não verifica se o resultado da busca é nulo. Um atacante autenticado fornece um ID inexistente, o código tenta acessar propriedades do resultado nulo e a aplicação falha ou se comporta de forma imprevista.

How to mitigate

Sempre validar retornos de funções que podem ser nulos antes de acessar seus membros ou métodos. Use assertions, verificações explícitas (if obj != null) ou mecanismos de linguagem como optional/Maybe types para forçar o tratamento seguro de valores nulos.

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%