CVE-2018-8778 Information

Description

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 Stringunpack method resulting in a massive and controlled information disclosure.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html http://www.securityfocus.com/bid/103693 http://www.securitytracker.com/id/1042004 https://access.redhat.com/errata/RHSA-2018:3729 https://access.redhat.com/errata/RHSA-2018:3730 https://access.redhat.com/errata/RHSA-2018:3731 https://access.redhat.com/errata/RHSA-2019:2028 https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html https://usn.ubuntu.com/3626-1/ https://www.debian.org/security/2018/dsa-4259 https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/ https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/ https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/ https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/ https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5