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Vulnerability Details : CVE-2018-8778

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.
Publish Date : 2018-04-03 Last Update Date : 2019-10-03
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 134

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2019:2028: ruby security update (Moderate) oval:com.redhat.rhsa:def:20192028 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2018-8778

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 17.10 * * * Version Details Vulnerabilities
4 OS Debian Debian Linux 7.0 * * * Version Details Vulnerabilities
5 OS Debian Debian Linux 8.0 * * * Version Details Vulnerabilities
6 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
7 OS Redhat Enterprise Linux 6.0 * * * Version Details Vulnerabilities
8 OS Redhat Enterprise Linux 7.0 * * * Version Details Vulnerabilities
9 OS Redhat Enterprise Linux 7.4 * * * Version Details Vulnerabilities
10 OS Redhat Enterprise Linux 7.5 * * * Version Details Vulnerabilities
11 OS Redhat Enterprise Linux 7.6 * * * Version Details Vulnerabilities
12 Application Ruby-lang Ruby * * * * Version Details Vulnerabilities
13 Application Ruby-lang Ruby 2.6.0 Preview1 * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 3
Debian Debian Linux 3
Redhat Enterprise Linux 5
Ruby-lang Ruby 2

- References For CVE-2018-8778

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
SUSE openSUSE-SU-2019:1771
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/ CONFIRM
https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html
MLIST [debian-lts-announce] 20180423 [SECURITY] [DLA 1359-1] ruby1.8 security update
https://www.debian.org/security/2018/dsa-4259
DEBIAN DSA-4259
https://access.redhat.com/errata/RHSA-2018:3730
REDHAT RHSA-2018:3730
http://www.securitytracker.com/id/1042004
SECTRACK 1042004
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
MLIST [debian-lts-announce] 20180714 [SECURITY] [DLA 1421-1] ruby2.1 security update
https://access.redhat.com/errata/RHSA-2018:3731
REDHAT RHSA-2018:3731
https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/ CONFIRM
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/ CONFIRM
https://usn.ubuntu.com/3626-1/
UBUNTU USN-3626-1
https://access.redhat.com/errata/RHSA-2018:3729
REDHAT RHSA-2018:3729
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/ CONFIRM
http://www.securityfocus.com/bid/103693
BID 103693 Ruby CVE-2018-8778 Arbitrary Memory Disclosure Vulnerability Release Date:2018-03-28
https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/ CONFIRM
https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html
MLIST [debian-lts-announce] 20180423 [SECURITY] [DLA 1358-1] ruby1.9.1 security update
https://access.redhat.com/errata/RHSA-2019:2028
REDHAT RHSA-2019:2028

- Metasploit Modules Related To CVE-2018-8778

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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