CVE-2018-8780

NameCVE-2018-8780
DescriptionIn Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, the Dir.open, Dir.new, Dir.entries and Dir.empty? methods do not check NULL characters. When using the corresponding method, unintentional directory traversal may be performed.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1358-1, DLA-1359-1, DLA-1421-1, DSA-4259-1
NVD severityhigh (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ruby2.1 (PTS)jessie2.1.5-2+deb8u3vulnerable
jessie (security)2.1.5-2+deb8u4fixed
ruby2.3 (PTS)stretch2.3.3-1+deb9u2vulnerable
stretch (security)2.3.3-1+deb9u3fixed
ruby2.5 (PTS)buster, sid2.5.1-5fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ruby1.8source(unstable)(unfixed)high
ruby1.8sourcewheezy1.8.7.358-7.1+deb7u6highDLA-1359-1
ruby1.9.1source(unstable)(unfixed)high
ruby1.9.1sourcewheezy1.9.3.194-8.1+deb7u8highDLA-1358-1
ruby2.1source(unstable)(unfixed)high
ruby2.1sourcejessie2.1.5-2+deb8u4highDLA-1421-1
ruby2.3source(unstable)(unfixed)high
ruby2.3sourcestretch2.3.3-1+deb9u3highDSA-4259-1
ruby2.5source(unstable)2.5.1-1high

Notes

https://www.ruby-lang.org/en/news/2018/03/28/poisoned-nul-byte-dir-cve-2018-8780/
https://hackerone.com/reports/302338
Fixed by: https://github.com/ruby/ruby/commit/bd5661a3cbb38a8c3a3ea10cd76c88bbef7871b8
Fixed by: https://github.com/ruby/ruby/commit/143eb22f1877815dd802f7928959c5f93d4c7bb3 (2.2.10)

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