Fallos del tipo CWE-476

2556 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-2018-10914MEDIUMIt was found that an attacker could issue a xattr request via glusterfs FUSE to cause gluster brick process to crash which will result in a EPSS 2.3%CVE-2016-8626MEDIUMA flaw was found in Red Hat Ceph before 0.94.9-8. The way Ceph Object Gateway handles POST object requests permits an authenticated attackerEPSS 2.3%CVE-2011-1985HIGHwin32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SEPSS 2.3%CVE-2023-26463CRITICALstrongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named "public" for two different purposes witEPSS 2.3%CVE-2018-16852MEDIUMSamba from version 4.9.0 and before version 4.9.3 is vulnerable to a NULL pointer de-reference. During the processing of an DNS zone in the EPSS 2.2%CVE-2023-21586MEDIUMAcrobat Reader | NULL Pointer Dereference (CWE-476)EPSS 2.2%CVE-2020-8569MEDIUMKubernetes CSI snapshot-controller DoSEPSS 2.2%CVE-2020-13575HIGHA denial-of-service vulnerability exists in the WS-Addressing plugin functionality of Genivia gSOAP 2.8.107. A specially crafted SOAP requesEPSS 2.2%CVE-2021-39853MEDIUMAdobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-ServiceEPSS 2.2%CVE-2018-0305—A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remotEPSS 2.2%CVE-2016-9572MEDIUMA NULL pointer dereference flaw was found in the way openjpeg 2.1.2 decoded certain input images. Due to a logic error in the code responsibEPSS 2.2%CVE-2024-26183MEDIUMWindows Kerberos Denial of Service VulnerabilityEPSS 2.2%CVE-2024-38072HIGHWindows Remote Desktop Licensing Service Denial of Service VulnerabilityEPSS 2.2%CVE-1999-0052HIGHIP fragmentation denial of service in FreeBSD allows a remote attacker to cause a crash.EPSS 2.1%CVE-2025-60335HIGHA NULL pointer dereference in the main function of TOTOLINK N600R v4.3.0cu.7866_B20220506 allows attackers to cause a Denial of Service (DoSEPSS 2.1%CVE-2021-3671—A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). EPSS 2.1%CVE-2019-14847MEDIUMA flaw was found in samba 4.0.0 before samba 4.9.15 and samba 4.10.x before 4.10.10. An attacker can crash AD DC LDAP server via dirsync resEPSS 2.1%CVE-2024-21356MEDIUMWindows Lightweight Directory Access Protocol (LDAP) Denial of Service VulnerabilityEPSS 2.1%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 2.1%CVE-2021-43016MEDIUMAdobe InCopy NULL Pointer Dereference Application Denial of ServiceEPSS 2.1%