Falhas do tipo CWE-122

3.736 resultados

Estouro de heap

Ocorre quando código escreve mais dados do que o espaço alocado em uma região de memória dinâmica (heap), sobrescrevendo dados adjacentes. Um atacante pode explorar isso para corromper estruturas de dados críticas, contornar proteções de segurança ou executar código arbitrário.

Exemplo

Um servidor web aloca 256 bytes para armazenar um nome de usuário, mas copia 512 bytes de uma requisição sem validação. Os 256 bytes extras sobrescrevem ponteiros ou metadados do heap, permitindo execução de código ou negação de serviço.

Como mitigar

Use funções seguras que respeitam limites (strcpy_s, memcpy com tamanho verificado em runtime). Validar e limitar o tamanho de entrada antes de copiar. Ativar proteções como ASLR, stack canaries e ferramentas de sanitização (AddressSanitizer) em desenvolvimento.

CVE-2024-38088HIGHSQL Server Native Client OLE DB Provider Remote Code Execution VulnerabilityEPSS 1.7%CVE-2021-43305—Heap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operationsEPSS 1.7%CVE-2020-15800—A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT sEPSS 1.7%CVE-2021-43304—Heap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operationsEPSS 1.7%CVE-2021-24025—Due to incorrect string size calculations inside the preg_quote function, a large input string passed to the function can trigger an integerEPSS 1.7%CVE-2026-105016CRITICALMicrosoft QUIC Remote Code Execution VulnerabilityEPSS 1.7%CVE-2018-19093HIGHAn issue has been found in libIEC61850 v1.3. It is a SEGV in ControlObjectClient_setCommandTerminationHandler in client/client_control.c. NOEPSS 1.7%CVE-2024-43593HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.7%CVE-2024-43592HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.7%CVE-2024-37334HIGHMicrosoft OLE DB Driver for SQL Server Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-21367HIGHMicrosoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityEPSS 1.6%CVE-2025-21223HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-21361HIGHMicrosoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-43621HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-43622HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-21359HIGHMicrosoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-43620HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-21349HIGHMicrosoft ActiveX Data Objects Remote Code Execution VulnerabilityEPSS 1.6%CVE-2024-21368HIGHMicrosoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityEPSS 1.6%CVE-2025-20260CRITICALClamAV PDF Scanning Buffer Overflow VulnerabilityEPSS 1.6%