high
8.1
Advisory Published
CVE Published
CVE Published
Updated

CVE-2018-16396

First published: Thu Oct 25 2018(Updated: )

An issue was discovered in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. It does not taint strings that result from unpacking tainted strings with some formats.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
ubuntu/ruby1.9.1<1.9.3.484-2ubuntu1.13
1.9.3.484-2ubuntu1.13
ubuntu/ruby2.0<2.0.0.484-1ubuntu2.11
2.0.0.484-1ubuntu2.11
ubuntu/ruby2.3<2.3.1-2~16.04.11
2.3.1-2~16.04.11
ubuntu/ruby2.5<2.5.1-1ubuntu1.1
2.5.1-1ubuntu1.1
ubuntu/ruby2.5<2.5.1-5ubuntu4.1
2.5.1-5ubuntu4.1
debian/ruby2.1
debian/ruby2.5
ruby-lang Ruby>=2.3.0<=2.3.7
ruby-lang Ruby>=2.4.0<=2.4.4
ruby-lang Ruby>=2.5.0<=2.5.1
ruby-lang Ruby=2.6.0-preview1
ruby-lang Ruby=2.6.0-preview2
Ubuntu Linux=14.04
Ubuntu Linux=16.04
Ubuntu Linux=18.04
Ubuntu Linux=18.10
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Red Hat Enterprise Linux=6.0
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=7.4
Red Hat Enterprise Linux=7.5
Red Hat Enterprise Linux=7.6

Remedy

https://github.com/ruby/ruby/commit/a2958f6743664006d21fc0bafd4ca6214df1d429

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2018-16396?

    CVE-2018-16396 is a vulnerability discovered in Ruby before version 2.6.0-preview3 that does not taint strings that result from unpacking tainted strings with some formats.

  • What is the severity of CVE-2018-16396?

    The severity of CVE-2018-16396 is high, with a CVSS score of 8.1.

  • Which versions of Ruby are affected by CVE-2018-16396?

    Versions before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3 are affected by CVE-2018-16396.

  • How do I fix CVE-2018-16396 on Ubuntu?

    If you're on Ubuntu, upgrade to the corresponding fixed version for your release: 2.0.0.484-1ubuntu2.11 (Trusty), 2.3.1-2~16.04.11 (Xenial), 2.5.1-1ubuntu1.1 (Bionic), or 2.5.1-5ubuntu4.1 (Cosmic).

  • Where can I find more information about CVE-2018-16396?

    You can find more information about CVE-2018-16396 at the following references: [Debian Security Tracker](https://lists.debian.org/debian-lts-announce/2018/10/msg00020.html), [HackerOne](https://hackerone.com/reports/385070), [Ruby-lang website](https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/).

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