Falhas do tipo CWE-203

398 resultados

Discrepância Observável em Comportamento

Ocorre quando o sistema exibe comportamentos ou mensagens diferentes dependendo de informações secretas (senha, token, chave), permitindo que um atacante deduza essas informações através de análise de resposta. O perigo está em vazar conhecimento que deveria ser privado por meio de canais laterais, como tempo de resposta, mensagens de erro ou mudanças visuais.

Exemplo

Um formulário de login que retorna 'Usuário não existe' para usuários inválidos e 'Senha incorreta' para usuários válidos com senha errada. Um atacante usa essas mensagens diferentes para enumerar contas válidas sem nunca adivinhar a senha correta.

Como mitigar

Padronize respostas do sistema: retorne sempre a mesma mensagem genérica (ex: 'Credenciais inválidas') e o mesmo tempo de resposta, independentemente de qual parte falhou. Use técnicas como constant-time comparison para operações sensíveis e evite vazar informações através de timing, códigos HTTP diferenciados ou feedback textual discriminador.

CVE-2022-35888MEDIUMAmpere Altra and Ampere Altra Max devices through 2022-07-15 allow attacks via Hertzbleed, which is a power side-channel attack that extractEPSS 0.7%CVE-2023-34878HIGHAn issue was discovered in Ujcms v6.0.2 allows attackers to gain sensitive information via the dir parameter to /api/backend/core/web-file-hEPSS 0.7%CVE-2024-37880HIGHThe Kyber reference implementation before 9b8d306, when compiled by LLVM Clang through 18.x with some common optimization options, has a timEPSS 0.7%CVE-2024-13198MEDIUMlanghsu Mblog Blog System login observable response discrepancyEPSS 0.7%CVE-2022-41765MEDIUMAn issue was discovered in MediaWiki before 1.35.8, 1.36.x and 1.37.x before 1.37.5, and 1.38.x before 1.38.3. HTMLUserTextField exposes theEPSS 0.7%CVE-2026-33425MEDIUMDiscourse has inferable private group membership or existence via exclude_groups parameterEPSS 0.7%CVE-2025-21510HIGHVulnerability in the JD Edwards EnterpriseOne Tools product of Oracle JD Edwards (component: Web Runtime SEC). Supported versions that are EPSS 0.7%CVE-2025-41252HIGHUsername enumeration vulnerabilityEPSS 0.7%CVE-2023-43623MEDIUMA vulnerability has been identified in Mendix Forgot Password (Mendix 10 compatible) (All versions < V5.4.0), Mendix Forgot Password (MendixEPSS 0.7%CVE-2022-44381MEDIUMSnipe-IT through 6.0.14 allows attackers to check whether a user account exists because of response variations in a /password/reset request.EPSS 0.7%CVE-2023-25728MEDIUMThe <code>Content-Security-Policy-Report-Only</code> header could allow an attacker to leak a child iframe's unredacted URI when interactionEPSS 0.7%CVE-2025-21336MEDIUMWindows Cryptographic Information Disclosure VulnerabilityEPSS 0.7%CVE-2025-27667CRITICALVasion Print (formerly PrinterLogic) before Virtual Appliance Host 22.0.843 Application 20.0.1923 allows Administrative User Email EnumeratiEPSS 0.7%CVE-2023-54357HIGHJoomla com_booking 2.4.9 Information Disclosure via Account EnumerationEPSS 0.7%CVE-2023-26215HIGHTIBCO EBX® Add-ons Path TraversalEPSS 0.7%CVE-2023-27870MEDIUMIBM Spectrum Virtualize information disclosureEPSS 0.7%CVE-2023-26071HIGHAn issue was discovered in MCUBO ICT through 10.12.4 (aka 6.0.2). An Observable Response Discrepancy can occur under the login web page. In EPSS 0.7%CVE-2021-45925MEDIUMUsername EnumerationEPSS 0.6%CVE-2022-31742MEDIUMAn attacker could have exploited a timing attack by sending a large number of allowCredential entries and detecting the difference between iEPSS 0.6%CVE-2024-41952MEDIUMZitadel has an "Ignoring unknown usernames" vulnerabilityEPSS 0.6%