Уязвимость сохранения потенциально вредоносного содержимого при загрузке с использованием функции metalink в curl
Описание
При загрузке содержимого с использованием функции metalink в curl, загружаемое содержимое должно проверяться на соответствие хешу, который указан в XML-файле metalink. XML-файл metalink указывает клиенту, как получить одно и то же содержимое с разных URL, которые могут быть размещены на разных серверах. Клиент может загружать файл последовательно или параллельно. Если один из серверов, содержащих файл, скомпрометирован и содержимое файла заменено на изменённый вредоносный контент, curl должен обнаружить это по несовпадению хеша после завершения загрузки, удалить содержимое и попробовать загрузить файл с другого URL. Однако этого не происходит: несовпадение хеша только упоминается в тексте, а потенциально вредоносное содержимое сохраняется в файле на диске.
Тип уязвимости
Потенциальная компрометация безопасности данных
Ссылки
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Уязвимые конфигурации
Одно из
Одно из
Одновременно
Одновременно
Одновременно
Одновременно
Одновременно
Одновременно
Одновременно
Одно из
EPSS
6.5 Medium
CVSS3
4.3 Medium
CVSS2
Дефекты
Связанные уязвимости
When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and theclient can then download the file from one or several of them. In a serial orparallel manner.If one of the servers hosting the contents has been breached and the contentsof the specific file on that server is replaced with a modified payload, curlshould detect this when the hash of the file mismatches after a completeddownload. It should remove the contents and instead try getting the contentsfrom another URL. This is not done, and instead such a hash mismatch is onlymentioned in text and the potentially malicious content is kept in the file ondisk.
When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and theclient can then download the file from one or several of them. In a serial orparallel manner.If one of the servers hosting the contents has been breached and the contentsof the specific file on that server is replaced with a modified payload, curlshould detect this when the hash of the file mismatches after a completeddownload. It should remove the contents and instead try getting the contentsfrom another URL. This is not done, and instead such a hash mismatch is onlymentioned in text and the potentially malicious content is kept in the file ondisk.
When curl is instructed to download content using the metalink feature ...
When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and theclient can then download the file from one or several of them. In a serial orparallel manner.If one of the servers hosting the contents has been breached and the contentsof the specific file on that server is replaced with a modified payload, curlshould detect this when the hash of the file mismatches after a completeddownload. It should remove the contents and instead try getting the contentsfrom another URL. This is not done, and instead such a hash mismatch is onlymentioned in text and the potentially malicious content is kept in the file ondisk.
Уязвимость программного средства для взаимодействия с серверами CURL, связанная с недостатками алгоритма вычисления контрольной суммы, позволяющая нарушителю оказать воздействие на целостность данных
EPSS
6.5 Medium
CVSS3
4.3 Medium
CVSS2