Fallos del tipo CWE-476

2328 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-2024-36387MEDIUMApache HTTP Server: DoS by Null pointer in websocket over HTTP/2EPSS 1.7%CVE-2024-47007HIGHA NULL pointer dereference in WLAvalancheService.exe of Ivanti Avalanche before version 6.4.5 allows a remote unauthenticated attacker to caEPSS 1.7%CVE-2025-11847MEDIUMA null pointer dereference vulnerability in the IP settings CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C0EPSS 1.7%CVE-2021-3480—A flaw was found in slapi-nis in versions before 0.56.7. A NULL pointer dereference during the parsing of the Binding DN could allow an unauEPSS 1.7%CVE-2026-59132HIGHWindows TCP/IP Denial of Service VulnerabilityEPSS 1.7%CVE-2023-21700HIGHWindows iSCSI Discovery Service Denial of Service VulnerabilityEPSS 1.7%CVE-2023-24859HIGHWindows Internet Key Exchange (IKE) Extension Denial of Service VulnerabilityEPSS 1.7%CVE-2020-26235MEDIUMSegmentation fault in Rust time crateEPSS 1.6%CVE-2024-27053HIGHwifi: wilc1000: fix RCU usage in connect pathEPSS 1.6%CVE-2021-4110CRITICALNULL Pointer Dereference in mruby/mrubyEPSS 1.6%CVE-2023-3354HIGHImproper i/o watch removal in tls handshake can lead to remote unauthenticated denial of serviceEPSS 1.6%CVE-2022-1620MEDIUMNULL Pointer Dereference in function vim_regexec_string at regexp.c:2729 in vim/vimEPSS 1.6%CVE-2022-32663HIGHIn Wi-Fi driver, there is a possible system crash due to null pointer dereference. This could lead to remote denial of service with no additEPSS 1.6%CVE-2020-5736—Amcrest cameras and NVR are vulnerable to a null pointer dereference over port 37777. An authenticated remote attacker can abuse this issue EPSS 1.6%CVE-2021-20213—A flaw was found in Privoxy in versions before 3.0.29. Dereference of a NULL-pointer that could result in a crash if accept-intercepted-requEPSS 1.6%CVE-2023-39351MEDIUMFreeRDP Null Pointer Dereference leading denial of serviceEPSS 1.6%CVE-2026-20875HIGHWindows Local Security Authority Subsystem Service (LSASS) Denial of Service VulnerabilityEPSS 1.6%CVE-2011-1282HIGHThe Client/Server Run-time Subsystem (aka CSRSS) in the Win32 subsystem in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, WindowEPSS 1.6%CVE-2023-6535MEDIUMKernel: null pointer dereference in nvmet_tcp_execute_requestEPSS 1.5%CVE-2023-6536MEDIUMKernel: null pointer dereference in __nvmet_req_completeEPSS 1.5%