CVE-2017-17042: Directory traversal

November 28, 2017 (updated December 20, 2017)

lib/yard/core_ext/file.rb does not block relative paths with an initial ../ sequence, which allows attackers to conduct directory traversal attacks and read arbitrary files.

References

github.com/lsegal/yard/commit/b0217b3e30dc53d057b1682506333335975e62b4
nvd.nist.gov/vuln/detail/CVE-2017-17042

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