Описание
A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
Пакеты
| Пакет | Статус | Версия исправления | Релиз | Тип |
|---|---|---|---|---|
| ruby2.5 | fixed | 2.5.5-1 | package | |
| ruby2.3 | removed | package | ||
| ruby2.1 | removed | package | ||
| rubygems | fixed | 3.2.0~rc.1-1 | package | |
| jruby | fixed | 9.1.17.0-3 | package | |
| jruby | not-affected | jessie | package |
Примечания
https://www.ruby-lang.org/en/news/2019/03/05/multiple-vulnerabilities-in-rubygems/
https://blog.rubygems.org/2019/03/05/security-advisories-2019-03.html
https://github.com/rubygems/rubygems/commit/56c0bbb69e4506bda7ef7f447dfec5db820df20b
Связанные уязвимости
A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
RubyGems Delete directory using symlink when decompressing tar
Уязвимость системы управления пакетами RubyGems, связанная с неверным ограничением имени пути к каталогу с ограниченным доступом, позволяющая нарушителю оказать воздействие целостность данных