The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade Ubuntu:24.10
ruby-rack
to version 2.2.7-1.1ubuntu0.1 or higher.
Note: Versions mentioned in the description apply only to the upstream ruby-rack
package and not the ruby-rack
package as distributed by Ubuntu
.
See How to fix?
for Ubuntu:24.10
relevant fixed versions and status.
Rack provides an interface for developing web applications in Ruby. Prior to versions 2.2.13, 3.0.14, and 3.1.12, Rack::Static
can serve files under the specified root:
even if urls:
are provided, which may expose other files under the specified root:
unexpectedly. The vulnerability occurs because Rack::Static
does not properly sanitize user-supplied paths before serving files. Specifically, encoded path traversal sequences are not correctly validated, allowing attackers to access files outside the designated static file directory. By exploiting this vulnerability, an attacker can gain access to all files under the specified root:
directory, provided they are able to determine then path of the file. Versions 2.2.13, 3.0.14, and 3.1.12 contain a patch for the issue. Other mitigations include removing usage of Rack::Static
, or ensuring that root:
points at a directory path which only contains files which should be accessed publicly. It is likely that a CDN or similar static file server would also mitigate the issue.