CVE-2022-27781

libcurl proporciona la opción "CURLOPT_CERTINFO" para permitir que las aplicaciones soliciten que se devuelvan detalles sobre la cadena de certificados de un servidor. Debido a una función errónea, un servidor malicioso podría hacer que libcurl construido conNSS quedara atascado en un bucle ocupado interminable cuando intentara recuperar esa información

A vulnerability was found in curl. This issue occurs due to an erroneous function. A malicious server could make curl within Network Security Services (NSS) get stuck in a never-ending busy loop when trying to retrieve that information. This flaw allows an Infinite Loop, affecting system availability.

Axel Chong discovered that curl incorrectly handled percent-encoded URL separators. A remote attacker could possibly use this issue to trick curl into using the wrong URL and bypass certain checks or filters. This issue only affected Ubuntu 22.04 LTS. Florian Kohnhuser discovered that curl incorrectly handled returning a TLS server's certificate chain details. A remote attacker could possibly use this issue to cause curl to stop responding, resulting in a denial of service.