CVE-2026-39806: mtrudel bandit, отказ на услуга

8.7

CVSS 4.0

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

Експлоатация: има публичен пример за експлоатация
Атаката може да се автоматизира

Описание

Оригинално описание

Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in mtrudel bandit allows unauthenticated remote denial of service via worker process exhaustion. 'Elixir.Bandit.HTTP1.Socket':do_read_chunked_data!/5 in lib/bandit/http1/socket.ex terminates only when the last-chunk line 0\r\n is followed immediately by the empty trailer line \r\n. RFC 9112 §7.1.2 permits zero or more trailer fields between them. When trailers are present, none of the match clauses fit: the catch-all arm computes a negative to_read, calls read_available!/2, receives <<>> on timeout, and tail-recurses with unchanged state. The worker process is pinned for the lifetime of the TCP connection. A handful of concurrent connections sending RFC-conformant chunked requests with trailer fields is sufficient to exhaust the Bandit worker pool and render the server unresponsive to all further traffic. No authentication, special headers, or large payload is required. Proxies such as NGINX and HAProxy legitimately forward trailer-bearing requests, so servers behind such proxies may be affected without any malicious client involvement. This issue affects bandit: from 1.6.1 before 1.11.1.

Засегнати продукти

mtrudel bandit: 1.6.1 преди 1.11.1
mtrudel bandit: e73e379ab59840e8561b5730878f16e29ab06217 преди ae3520dfdbfab115c638f8c7f6f6b805db34e1ab

CVE-2026-39806: mtrudel bandit, отказ на услуга

Описание

Засегнати продукти

Вид слабост

История

Други уязвимости в mtrudel bandit

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