A Regular Expression Denial of Service (ReDoS) vulnerability exists in the XMLFeedSpider class of the scrapy/scrapy project, specifically in the parsing of XML content. By crafting malicious XML content that exploits inefficient regular expression complexity used in the parsing process, an attacker can cause a denial-of-service (DoS) condition. This vulnerability allows for the system to hang and consume significant resources, potentially rendering services that utilize Scrapy for XML processing unresponsive.
Se descubrió que partes de la API Scrapy eran vulnerables a un ataque ReDoS. Manejar una respuesta maliciosa podría causar un uso extremo de CPU y memoria durante el análisis de su contenido, debido al uso de expresiones regulares vulnerables para ese análisis.
It was discovered that Scrapy improperly exposed HTTP authentication credentials to request targets, including during redirects. An attacker could use this issue to gain unauthorized access to user accounts. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. It was discovered that Scrapy did not remove the cookie header during cross-domain redirects. An attacker could possibly use this issue to gain unauthorized access to user accounts. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS.
