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-2023-24938MEDIUMWindows CryptoAPI Denial of Service VulnerabilityEPSS 2.0%CVE-2019-12654HIGHCisco IOS and IOS XE Software Session Initiation Protocol Denial of Service VulnerabilityEPSS 2.0%CVE-2019-12647HIGHCisco IOS and IOS XE Software IP Ident Denial of Service VulnerabilityEPSS 2.0%CVE-2023-21683HIGHWindows Internet Key Exchange (IKE) Extension Denial of Service VulnerabilityEPSS 2.0%CVE-2021-42528MEDIUMXMP-Toolkit Null Pointer Dereference Application denial-of-serviceEPSS 2.0%CVE-2023-35338HIGHWindows Peer Name Resolution Protocol Denial of Service VulnerabilityEPSS 2.0%CVE-2021-41689HIGHDCMTK through 3.6.6 does not handle string copy properly. Sending specific requests to the dcmqrdb program, it would query its database and EPSS 2.0%CVE-2023-2953HIGHA vulnerability was found in openldap. This security flaw causes a null pointer dereference in ber_memalloc_x() function.EPSS 1.9%CVE-2021-39852MEDIUMAdobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-ServiceEPSS 1.9%CVE-2021-39850MEDIUMAdobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-ServiceEPSS 1.9%CVE-2021-39849MEDIUMAdobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-ServiceEPSS 1.9%CVE-2021-39851MEDIUMAdobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-ServiceEPSS 1.9%CVE-2021-20274—A flaw was found in privoxy before 3.0.32. A crash may occur due a NULL-pointer dereference when the socks server misbehaves.EPSS 1.9%CVE-2021-35985MEDIUMAdobe Acrobat Pro DC PDFLibTool Null Pointer Dereference BugEPSS 1.9%CVE-2019-1900HIGHCisco Integrated Management Controller Unauthenticated Denial of Service VulnerabilityEPSS 1.9%CVE-2021-3596—A NULL pointer dereference flaw was found in ImageMagick in versions prior to 7.0.10-31 in ReadSVGImage() in coders/svg.c. This issue is dueEPSS 1.9%CVE-2020-13583HIGHA denial-of-service vulnerability exists in the HTTP Server functionality of Micrium uC-HTTP 3.01.00. A specially crafted HTTP request can lEPSS 1.9%CVE-2025-0492HIGHD-Link DIR-823X FUN_00412244 null pointer dereferenceEPSS 1.9%CVE-2021-28601LOWAdobe After Effects NULL Pointer Dereference vulnerabilityEPSS 1.9%CVE-2025-11848MEDIUMA null pointer dereference vulnerability in the Wake-on-LAN CGI program of the Zyxel VMG3625-T50B firmware version through 5.50(ABPM.9.6)C0 EPSS 1.8%