Fallos del tipo CWE-476

2570 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-2021-35985MEDIUMAdobe Acrobat Pro DC PDFLibTool Null Pointer Dereference BugEPSS 1.9%CVE-2021-4209—A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input mEPSS 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-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-2021-28601LOWAdobe After Effects NULL Pointer Dereference vulnerabilityEPSS 1.9%CVE-2023-0401HIGHNULL dereference during PKCS7 data verificationEPSS 1.8%CVE-2023-0216HIGHInvalid pointer dereference in d2i_PKCS7 functionsEPSS 1.8%CVE-2023-0217HIGHNULL dereference validating DSA public keyEPSS 1.8%CVE-2025-8175HIGHD-Link DI-8400 jhttpd usb_paswd.asp null pointer dereferenceEPSS 1.8%CVE-2022-23476HIGHUnchecked return value from xmlTextReaderExpand in NokogiriEPSS 1.8%CVE-2020-24421MEDIUMAdobe InDesign 15.1.2 NULL Pointer Dereference BugEPSS 1.8%CVE-2021-35984MEDIUMAdobe Acrobat Pro DC PDFLibTool Null Pointer Dereference BugEPSS 1.8%CVE-2021-42268MEDIUMAdobe Animate FLA File Parsing Null Pointer Dereference Application Denial of ServiceEPSS 1.8%CVE-2020-27279HIGHA NULL pointer deference vulnerability has been identified in the protocol converter. An attacker could send a specially crafted packet thatEPSS 1.8%CVE-2023-32084HIGHHTTP.sys Denial of Service VulnerabilityEPSS 1.8%CVE-2025-60336HIGHA NULL pointer dereference in the sub_41773C function of TOTOLINK N600R v4.3.0cu.7866_B20220506 allows attackers to cause a Denial of ServicEPSS 1.8%CVE-2021-20299—A flaw was found in OpenEXR's Multipart input file functionality. A crafted multi-part input file with no actual parts can trigger a NULL poEPSS 1.8%CVE-2017-7655—In Eclipse Mosquitto version from 1.0 to 1.4.15, a Null Dereference vulnerability was found in the Mosquitto library which could lead to craEPSS 1.8%CVE-2021-20296—A flaw was found in OpenEXR in versions before 3.0.0-beta. A crafted input file supplied by an attacker, that is processed by the Dwa decompEPSS 1.7%