7.5
HIGH
CVE-2018-8778
Ruby String#unpack Buffer Under-read Information Disclosure
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.

INFO

Published Date :

April 3, 2018, 10:29 p.m.

Last Modified :

Oct. 3, 2019, 12:03 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2018-8778 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2018-8778 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Ruby-lang ruby
1 Canonical ubuntu_linux
1 Redhat enterprise_linux
1 Debian debian_linux
: Total Affected Vendor : 4 | Products : 4
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2018-8778.

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

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
lnick2023/nicenice

None

Updated: 1 year, 9 months ago
0 stars 0 fork 0 watcher
Born at : Jan. 11, 2023, 1:21 p.m. This repo has been linked 1042 different CVEs too.
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vincent-deng/veracode-container-security-finding-parser

Map Vulnerabilities into Different Layers of the Container Image

Python

Updated: 1 year, 10 months ago
1 stars 0 fork 0 watcher
Born at : Oct. 5, 2022, 12:07 p.m. This repo has been linked 1276 different CVEs too.
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xbl3/awesome-cve-poc_qazbnm456

None

Updated: 2 months, 4 weeks ago
13 stars 4 fork 4 watcher
Born at : May 25, 2020, 7:51 a.m. This repo has been linked 1027 different CVEs too.
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qazbnm456/awesome-cve-poc

✍️ A curated list of CVE PoCs.

awesome cve poc

Updated: 2 months ago
3289 stars 678 fork 678 watcher
Born at : Feb. 2, 2017, 6:43 a.m. This repo has been linked 1042 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2018-8778 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2018-8778 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    Oct. 03, 2019

    Action Type Old Value New Value
    Changed CWE CWE-200 CWE-134 CWE-134
  • CVE Modified by [email protected]

    Aug. 06, 2019

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2019:2028 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 21, 2019

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html [No Types Assigned]
  • CPE Deprecation Remap by [email protected]

    Apr. 22, 2019

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:6:*:*:*:*:*:*:* OR *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
  • Modified Analysis by [email protected]

    Feb. 28, 2019

    Action Type Old Value New Value
    Changed Reference Type https://access.redhat.com/errata/RHSA-2018:3729 No Types Assigned https://access.redhat.com/errata/RHSA-2018:3729 Third Party Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html No Types Assigned https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html Mailing List, Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2018/dsa-4259 No Types Assigned https://www.debian.org/security/2018/dsa-4259 Third Party Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html Third Party Advisory https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html Mailing List, Third Party Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html Third Party Advisory https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html Mailing List, Third Party Advisory
    Changed Reference Type http://www.securitytracker.com/id/1042004 No Types Assigned http://www.securitytracker.com/id/1042004 Third Party Advisory, VDB Entry
    Changed Reference Type https://access.redhat.com/errata/RHSA-2018:3731 No Types Assigned https://access.redhat.com/errata/RHSA-2018:3731 Third Party Advisory
    Changed Reference Type https://access.redhat.com/errata/RHSA-2018:3730 No Types Assigned https://access.redhat.com/errata/RHSA-2018:3730 Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:6:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 30, 2018

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2018:3731 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2018:3730 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2018:3729 [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 31, 2018

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1042004 [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 03, 2018

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2018/dsa-4259 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 15, 2018

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html [No Types Assigned]
  • Initial Analysis by [email protected]

    May. 15, 2018

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/ No Types Assigned https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-4-4-released/ Patch, Vendor Advisory
    Changed Reference Type https://usn.ubuntu.com/3626-1/ No Types Assigned https://usn.ubuntu.com/3626-1/ Third Party Advisory
    Changed Reference Type http://www.securityfocus.com/bid/103693 No Types Assigned http://www.securityfocus.com/bid/103693 Third Party Advisory, VDB Entry
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html No Types Assigned https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html Third Party Advisory
    Changed Reference Type https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/ No Types Assigned https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/ Patch, Vendor Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html No Types Assigned https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html Third Party Advisory
    Changed Reference Type https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/ No Types Assigned https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/ Patch, Vendor Advisory
    Changed Reference Type https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/ No Types Assigned https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/ Vendor Advisory
    Changed Reference Type https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/ No Types Assigned https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-5-1-released/ Patch, Vendor Advisory
    Added CWE CWE-200
    Added CPE Configuration OR *cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* versions from (including) 2.2.0 up to (excluding) 2.2.10 *cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* versions from (including) 2.3.0 up to (excluding) 2.3.7 *cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* versions from (including) 2.4.0 up to (excluding) 2.4.4 *cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* versions from (including) 2.5.0 up to (excluding) 2.5.1 *cpe:2.3:a:ruby-lang:ruby:2.6.0:preview1:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Apr. 25, 2018

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2018/04/msg00024.html [No Types Assigned]
    Added Reference https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html [No Types Assigned]
  • CVE Modified by [email protected]

    Apr. 18, 2018

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/3626-1/ [No Types Assigned]
  • CVE Modified by [email protected]

    Apr. 11, 2018

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/103693 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2018-8778 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2018-8778 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.42 }} 0.01%

score

0.74437

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: