CVE-2018-8778

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.

Scores

Weaknesses (CWE)

• CWE-134

European references

• ENISA EUVD · EUVD-2018-20387
• GCVE · GCVE-0-2018-8778

CERT-FR advisories

• CERTFR-2022-AVI-267 — Multiples vulnérabilités dans Juniper Networks Junos Space · cert.ssi.gouv.fr
• CERTFR-2018-AVI-524 — Multiples vulnérabilités dans les produits Apple · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* ≥ 2.2.0 < 2.2.10
• cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* ≥ 2.3.0 < 2.3.7
• cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* ≥ 2.4.0 < 2.4.4
• cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* ≥ 2.5.0 < 2.5.1
• cpe:2.3:a:ruby-lang:ruby:2.6.0:preview1:*:*:*:*:*:*
• 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:*:*:*:*:*:*:*
• 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:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
• 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:*:*:*:*:*:*:*

Affected products

References

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

Sources