Falhas do tipo CWE-416

5.038 resultados

Uso após liberação de memória

Ocorre quando o código tenta acessar (ler ou escrever) um bloco de memória que já foi liberado (free, delete). O programa mantém um ponteiro para a memória, mas o sistema operacional pode reatribuir essa região para outro uso, causando corrupção de dados, travamento ou execução de código arbitrário.

Exemplo

Um servidor web aloca memória para armazenar dados de sessão do usuário, depois libera essa memória quando a sessão encerra. Se uma thread continuar tentando acessar essa sessão após a liberação, pode ler dados de outra sessão ou sobrescrever dados críticos de outro processo.

Como mitigar

Sempre anule ponteiros após liberar memória (ptr = NULL), use variáveis de controle para rastrear estado de alocação, implemente gerenciamento automático de memória quando possível (smart pointers em C++), e execute testes com sanitizers (AddressSanitizer, Valgrind) durante desenvolvimento e CI/CD.

CVE-2022-28271HIGHAdobe Photoshop PDF File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 3.3%CVE-2018-17623—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 3.3%CVE-2018-17624—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.1.0.5096. User interactioEPSS 3.3%CVE-2018-17615—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 3.3%CVE-2018-17618—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 3.3%CVE-2024-38147HIGHMicrosoft DWM Core Library Elevation of Privilege VulnerabilityEPSS 3.3%CVE-2023-38224HIGHZDI-CAN-21122: Adobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 3.2%CVE-2024-41831HIGHZDI-CAN-24569: Adobe Acrobat Reader DC AcroForm Use-After-Free Remote Code Execution VulnerabilityEPSS 3.2%CVE-2022-34237MEDIUMAdobe Acrobat Reader DC Font Parsing Use-After-Free Information Disclosure VulnerabilityEPSS 3.2%CVE-2023-1531HIGHUse after free in ANGLE in Google Chrome prior to 111.0.5563.110 allowed a remote attacker to potentially exploit heap corruption via a crafEPSS 3.2%CVE-2017-10948—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 8.2.1.6871. User interactioEPSS 3.2%CVE-2023-38225HIGHZDI-CAN-21118: Adobe Acrobat Reader DC AcroForm Use-After-Free Remote Code Execution VulnerabilityEPSS 3.2%CVE-2024-43582HIGHRemote Desktop Protocol Server Remote Code Execution VulnerabilityEPSS 3.2%CVE-2023-26422HIGHZDI-CAN-20176: Adobe Acrobat Reader DC AcroForm deleteItemAt Use-After-Free Remote Code Execution VulnerabilityEPSS 3.1%CVE-2023-26423HIGHZDI-CAN-20160: Adobe Acrobat Reader DC AcroForm insertItemAt Use-After-Free Remote Code Execution VulnerabilityEPSS 3.1%CVE-2019-6768HIGHThis vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.4.1.16828. User interactiEPSS 3.1%CVE-2019-5145HIGHAn exploitable use-after-free vulnerability exists in the JavaScript engine of Foxit PDF Reader, version 9.7.0.29435. A specially crafted PDEPSS 3.1%CVE-2021-34835HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 3.1%CVE-2021-34834HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 3.1%CVE-2021-42380HIGHA 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 3.1%