Weaknesses of type CWE-416

5,042 results

Uso após liberação de memória

Ocorre quando o código tenta acessar um bloco de memória que já foi desalocado (free/delete). O ponteiro continua apontando para aquele endereço, mas o dado ali pode ter sido sobrescrito por outra operação, causando comportamento impredizível, corrupção de dados ou execução de código arbitrário.

Example

Um buffer é alocado, depois liberado com free(). Mais adiante, o código ainda tenta ler ou escrever naquele mesmo ponteiro sem verificar. Se um atacante controlar a alocação subsequente daquele endereço, consegue manipular o conteúdo que será lido.

How to mitigate

Anule o ponteiro imediatamente após liberar (ptr = NULL), implemente análise estática para detectar acessos pós-liberação, use ferramentas como valgrind ou AddressSanitizer nos testes, e considere linguagens com gerenciamento automático de memória para código sensível.

CVE-2018-11617—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interactiEPSS 2.8%CVE-2018-14299—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14303—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14298—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14307—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14288—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. User interactioEPSS 2.8%CVE-2018-14301—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14297—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14291—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14296—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14315—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-11619—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interactiEPSS 2.8%CVE-2018-14292—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14310—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.1.0.5096. User interactioEPSS 2.8%CVE-2024-39383HIGHPoC sample of unknown vulnerability detected by EXPMON systemEPSS 2.8%CVE-2021-31455HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576. User interactioEPSS 2.8%CVE-2021-42382HIGHA use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theEPSS 2.8%CVE-2021-36055HIGHXMP Toolkit SDK Use After Free Vulnerability In ReadingXMPNewDOM Could Lead To Arbitrary Code ExecutionEPSS 2.8%CVE-2019-19344MEDIUMThere is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x verEPSS 2.8%CVE-2021-31458HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576. User interactioEPSS 2.8%