CVE-2018-8778

CVSS V2 Medium 5 CVSS V3 High 7.5

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 String#unpack method, resulting in a massive and controlled information disclosure.

Overview

CVE ID
CVE-2018-8778

Assigner
cve@mitre.org

Vulnerability Status
Modified

Published Version
2018-04-03T22:29:00

Last Modified Date
2019-10-03T00:03:26

Weakness Enumerations

CWE	URL
CWE-134	http://cwe.mitre.org/data/definitions/134.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:ruby-lang:ruby::::::::	1	OR	2.2.0	2.2.10
cpe:2.3:a:ruby-lang:ruby::::::::	1	OR	2.3.0	2.3.7
cpe:2.3:a:ruby-lang:ruby::::::::	1	OR	2.4.0	2.4.4
cpe:2.3:a:ruby-lang:ruby::::::::	1	OR	2.5.0	2.5.1
cpe:2.3:a:ruby-lang:ruby:2.6.0:preview1::::::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::	1	OR
cpe:2.3:o:canonical:ubuntu_linux:17.10:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:7.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:8.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:9.0:::::::*	1	OR
cpe:2.3:o:redhat:enterprise_linux:6.0:::::::*	1	OR
cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*	1	OR
cpe:2.3:o:redhat:enterprise_linux:7.4:::::::*	1	OR
cpe:2.3:o:redhat:enterprise_linux:7.5:::::::*	1	OR
cpe:2.3:o:redhat:enterprise_linux:7.6:::::::*	1	OR

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
NONE

Availability Impact
NONE

Base Score
5

Severity
MEDIUM

Exploitability Score
10

Impact Score
2.9

CVSS Version 3

Version
3.0

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

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

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

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2018-8778
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8778

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:44:43				Added to TrackCVE
2022-12-03 04:17:47	2018-04-03T22:29Z	2018-04-03T22:29:00	CVE Published Date	updated
2022-12-03 04:17:47		2019-10-03T00:03:26	CVE Modified Date	updated
2022-12-03 04:17:47		Modified	Vulnerability Status	updated