Weaknesses of type CWE-405

74 results

Consumo assimétrico de recursos (amplificação)

O atacante consegue consumir uma quantidade desproporcional de recursos do servidor (CPU, memória, banda) com um esforço mínimo do seu lado. Ele envia poucos dados ou requisições simples, mas força o alvo a gastar muito mais processamento em resposta, criando um desequilíbrio de custo.

Example

Um serviço de busca que aceita regex complexas sem limite de tempo: o atacante envia uma expressão regular mal formada que causa backtracking exponencial, travando a CPU do servidor enquanto ele apenas enviou uma string pequena. Outro caso: um parser XML que expande entidades externas em cadeia, consumindo toda a memória com um arquivo XML mínimo.

How to mitigate

Implemente timeouts rigorosos em operações pesadas (regex, parsing, compressão), valide e limite a complexidade de entrada antes de processar, e use rate limiting para frear requisições sucessivas do mesmo cliente. Em APIs, rejeite payloads muito maiores que o esperado ou operações que exigem recursos desproporcionais.

CVE-2025-25186MEDIUMNet::IMAP vulnerable to possible DoS by memory exhaustionEPSS 0.6%CVE-2026-22775HIGHdevalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parseEPSS 0.6%CVE-2026-22774HIGHdevalue vulnerable to denial of service due to memory exhaustion in devalue.parseEPSS 0.6%CVE-2026-54874HIGHExcessive Memory Use Buffering DTLS Records for a Future EpochEPSS 0.6%CVE-2024-40705MEDIUMIBM InfoSphere Information Server denial of serviceEPSS 0.6%CVE-2023-2992HIGHAn unauthenticated  denial of service vulnerability exists in the SMM v1, SMM v2, and FPC management web server which can be triggered underEPSS 0.6%CVE-2024-56200HIGHUncontrolled Recursion and Asymmetric Resource Consumption in Altair media/file proxyEPSS 0.6%CVE-2026-78669HIGHExcessive CPU consumption from repeated initial window changes in net/httpEPSS 0.6%CVE-2024-28214LOWnGrinder before 3.5.9 allows to set delay without limitation, which could be the cause of Denial of Service by remote attacker.EPSS 0.6%CVE-2024-39743MEDIUMIBM MQ Container denial of serviceEPSS 0.6%CVE-2026-85783HIGHCrypt::Age versions before 0.004 for Perl allow CPU exhaustion via an unbounded number of recipient stanzas, each costing an X25519 scalar multiplication in unwrap_file_keyEPSS 0.6%CVE-2026-23934MEDIUMFrontend DoS via the validate.api.exists actionEPSS 0.6%CVE-2025-53633HIGHChall-Manager's scenario decoding process does not check for zip bombsEPSS 0.5%CVE-2026-97031HIGHReject malformed ECH outer extension references in crypto/tlsEPSS 0.5%CVE-2026-35626MEDIUMOpenClaw < 2026.3.22 - Unauthenticated Resource Exhaustion via Voice Call WebhookEPSS 0.5%CVE-2024-34703HIGHBotan Vulnerable to Denial of Service Due to Overly Large Elliptic Curve ParametersEPSS 0.5%CVE-2025-22166HIGHThis High severity DoS (Denial of Service) vulnerability was introduced in version 2.0 of Confluence Data Center. This DoS (Denial of SerEPSS 0.5%CVE-2025-43857MEDIUMnet-imap rubygem vulnerable to possible DoS by memory exhaustionEPSS 0.5%CVE-2026-110676HIGHCpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by encoding exponent notation as full decimal digits under allow_bignumEPSS 0.5%CVE-2026-84897MEDIUMwolfSSH server accepts server-to-client DH group exchange messages from an unauthenticated client, causing pre-authentication primality-test CPU exhaustion and key exchange role confusionEPSS 0.5%