high
7.5
CWE
134
Advisory Published
CVE Published
Updated

CVE-2018-8778

First published: Thu Mar 29 2018(Updated: )

In 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, an attacker controlling the unpacking format (similar to format string vulnerabilities) can trigger a buffer under-read in the String#unpack method, resulting in a massive and controlled information disclosure.

Credit: CVE-2017-0898 CVE-2017-10784 CVE-2017-14033 CVE-2017-14064 CVE-2017-17405 CVE-2017-17742 CVE-2018-6914 CVE-2018-8777 CVE-2018-8778 CVE-2018-8779 CVE-2018-8780 CVE-2017-0898 CVE-2017-10784 CVE-2017-14033 CVE-2017-14064 CVE-2017-17405 CVE-2017-17742 CVE-2018-6914 CVE-2018-8777 CVE-2018-8778 CVE-2018-8779 CVE-2018-8780 cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Ruby-lang Ruby>=2.2.0<2.2.10
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
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=17.10
Debian Debian Linux=7.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Redhat Enterprise Linux=6.0
Redhat Enterprise Linux=7.0
Redhat Enterprise Linux=7.4
Redhat Enterprise Linux=7.5
Redhat Enterprise Linux=7.6
Apple macOS Mojave<10.14.1
10.14.1
Apple High Sierra
Apple Sierra
Apple macOS High Sierra<10.13.6
10.13.6
Apple El Capitan
redhat/ruby<2.2.10
2.2.10
redhat/ruby<2.3.7
2.3.7
redhat/ruby<2.4.4
2.4.4
redhat/ruby<2.5.1
2.5.1
debian/ruby1.8
debian/ruby1.9.1
debian/ruby2.1
debian/ruby2.5

Remedy

https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/

Remedy

https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/

Remedy

https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/

Remedy

https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2018-8778?

    CVE-2018-8778 is a vulnerability in Ruby that allows an attacker to trigger a buffer under-read in the String#unpack method.

  • What is the severity of CVE-2018-8778?

    CVE-2018-8778 has a severity rating of 7.5, which is considered high.

  • How does CVE-2018-8778 affect Ruby versions?

    CVE-2018-8778 affects Ruby versions 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.

  • What is the remedy for CVE-2018-8778?

    To fix CVE-2018-8778, update Ruby to version 2.2.10, 2.3.7, 2.4.4, 2.5.1, or apply the appropriate security patches.

  • Where can I find more information about CVE-2018-8778?

    More information about CVE-2018-8778 can be found at the following references: [link1], [link2], [link3].

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