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Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVE-2020-5280

Severity High
Score 7.5/10

Summary

http4s before versions 0.18.26, 0.20.20, and 0.21.2 has a local file inclusion vulnerability. This vulnerability applies to all users of "org.http4s.server.staticcontent.FileService", "org.http4s.server.staticcontent.ResourceService" and "org.http4s.server.staticcontent.WebjarService". URI normalization is applied incorrectly. Requests whose path info contain "../" or "//" can expose resources outside of the configured location. This issue is patched in versions 0.18.26, 0.20.20, and 0.21.2. Note that 0.19.0 is a deprecated release and has never been supported.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • NONE

CWE-22 - Path Traversal

Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.

Advisory Timeline

  • Published