Falhas do tipo CWE-787

5.843 resultados

Escrita fora dos limites de memória

Ocorre quando um programa escreve dados em um endereço de memória fora da área alocada para um buffer ou variável. O código não valida o tamanho ou índice antes de gravar, permitindo sobrescrita de dados adjacentes, corrupção de estruturas críticas ou execução de código arbitrário.

Exemplo

Um formulário web que copia dados do usuário para um buffer de 256 bytes sem validar o tamanho da entrada. Se o atacante envia 500 bytes, a escrita transborda e sobrescreve a pilha, podendo hijackear o endereço de retorno da função.

Como mitigar

Use funções seguras de cópia (strncpy, strlcpy ao invés de strcpy; memcpy com tamanho máximo explícito) e sempre valide comprimento e índices antes de escrever. Em linguagens modernas, prefira estruturas com bounds-checking automático (arrays em Java, Rust, etc).

CVE-2023-2856MEDIUMVMS TCPIPtrace file parser crash in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via crafted capture fileEPSS 1.8%CVE-2025-9230CRITICALOut-of-bounds read & write in RFC 3211 KEK UnwrapEPSS 1.8%CVE-2024-25004HIGHKiTTY versions 0.76.1.13 and before is vulnerable to a stack-based buffer overflow via the username, occurs due to insufficient bounds checkEPSS 1.8%CVE-2019-1887HIGHCisco Unified Communications Manager Session Initiation Protocol Denial of Service VulnerabilityEPSS 1.8%CVE-2021-32988—FATEK Automation WinProladder Versions 3.30 and prior are vulnerable to an out-of-bounds write, which may allow an attacker to execute arbitEPSS 1.8%CVE-2022-33183HIGHA vulnerability in Brocade Fabric OS CLI before Brocade Fabric OS v9.1.0, 9.0.1e, 8.2.3c, 8.2.0cbn5, 7.4.2.j could allow a remote authenticaEPSS 1.8%CVE-2020-1894—A stack write overflow in WhatsApp for Android prior to v2.20.35, WhatsApp Business for Android prior to v2.20.20, WhatsApp for iPhone priorEPSS 1.8%CVE-2019-14906HIGHA flaw was found with the RHSA-2019:3950 erratum, where it did not fix the CVE-2019-13616 SDL vulnerability. This issue only affects Red HatEPSS 1.8%CVE-2023-23531HIGHThe issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.2, iOS 16.3 and iPadOS 16.3. An app may be abEPSS 1.8%CVE-2021-21046LOWAcrobat Reader DC Buffer Overflow Vulnerability Could Lead To Arbitrary Code ExecutionEPSS 1.7%CVE-2021-3405—A flaw was found in libebml before 1.4.2. A heap overflow bug exists in the implementation of EbmlString::ReadData and EbmlUnicodeString::ReEPSS 1.7%CVE-2021-34323—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Jt981.dll library EPSS 1.7%CVE-2024-29133MEDIUMApache Commons Configuration: StackOverflowError calling ListDelimiterHandler.flatten(Object, int) with a cyclical object treeEPSS 1.7%CVE-2022-42058CRITICALTenda AC1200 Router Model W15Ev2 V15.11.0.10(1576) was discovered to contain a stack overflow via the setRemoteWebManage function. This vulnEPSS 1.7%CVE-2018-14810—WECON Technology Co., Ltd. PI Studio HMI versions 4.1.9 and prior and PI Studio versions 4.2.34 and prior parse files and pass invalidated uEPSS 1.7%CVE-2023-30800HIGHMikroTik RouterOS Web Interface Heap CorruptionEPSS 1.7%CVE-2021-43754HIGHAdobe Prelude Corruption could lead to Arbitrary code executionEPSS 1.7%CVE-2024-23305CRITICALAn out-of-bounds write vulnerability exists in the BrainVisionMarker Parsing functionality of The Biosig Project libbiosig 2.5.0 and Master EPSS 1.7%CVE-2025-34105CRITICALDiskBoss Enterprise Stack-Based Buffer Overflow RCEEPSS 1.7%CVE-2021-41160MEDIUMImproper region checks in FreeRDP allow out of bound write to memoryEPSS 1.7%