Weaknesses of type CWE-476

2,328 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-2018-10918MEDIUMA null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker cEPSS 2.5%CVE-2016-6561—illumos smbsrv NULL pointer dereference allows system crash.EPSS 2.5%CVE-2024-38145HIGHWindows Layer-2 Bridge Network Driver Denial of Service VulnerabilityEPSS 2.5%CVE-2024-38146HIGHWindows Layer-2 Bridge Network Driver Denial of Service VulnerabilityEPSS 2.5%CVE-2023-29179MEDIUMA null pointer dereference in Fortinet FortiOS version 7.2.0 through 7.2.4, 7.0.0 through 7.0.11, 6.4.0 through 6.4.12, Fortiproxy version 7EPSS 2.5%CVE-2021-40732MEDIUMXMP Toolkit SDK Null Pointer DereferenceEPSS 2.4%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 2.4%CVE-2024-38233HIGHWindows Networking Denial of Service VulnerabilityEPSS 2.4%CVE-2010-4816—It was found in FreeBSD 8.0, 6.3 and 4.9, and OpenBSD 4.6 that a null pointer dereference in ftpd/popen.c may lead to remote denial of serviEPSS 2.4%CVE-2021-39860MEDIUMAdobe Acrobat Reader DC Search Plugin Null Pointer DereferenceEPSS 2.4%CVE-2021-39854MEDIUMAdobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-ServiceEPSS 2.4%CVE-2020-10703MEDIUMA NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0, and fixed in libvirt 6.0.0, for fEPSS 2.4%CVE-2024-49121HIGHWindows Lightweight Directory Access Protocol (LDAP) Denial of Service VulnerabilityEPSS 2.4%CVE-2020-10739HIGHIstio 1.4.x before 1.4.9 and Istio 1.5.x before 1.5.4 contain the following vulnerability when telemetry v2 is enabled: by sending a specialEPSS 2.3%CVE-2023-36602HIGHWindows TCP/IP Denial of Service VulnerabilityEPSS 2.3%CVE-2023-36603HIGHWindows TCP/IP Denial of Service VulnerabilityEPSS 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-2024-38232HIGHWindows Networking Denial of Service VulnerabilityEPSS 2.3%CVE-2023-40459HIGHImproper input leads to DoSEPSS 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%