Null Byte Interaction Error (Poison Null Byte) Affecting rubygems package, versions <0:2.0.14.1-36.el7_6
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL7-RUBYGEMS-4935424
- published26 Jul 2021
- disclosed28 Mar 2018
Introduced: 28 Mar 2018
CVE-2018-8780 (opens in a new tab)How to fix?
Upgrade RHEL:7 rubygems to version 0:2.0.14.1-36.el7_6 or higher.
This issue was patched in RHSA-2020:0663.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rubygems package and not the rubygems package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
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, the Dir.open, Dir.new, Dir.entries and Dir.empty? methods do not check NULL characters. When using the corresponding method, unintentional directory traversal may be performed.
References
- http://www.securityfocus.com/bid/103739
- https://www.ruby-lang.org/en/news/2018/03/28/poisoned-nul-byte-dir-cve-2018-8780/
- 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/
- https://access.redhat.com/security/cve/CVE-2018-8780
- https://www.debian.org/security/2018/dsa-4259
- 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://access.redhat.com/errata/RHSA-2020:0663
- http://www.securitytracker.com/id/1042004
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
- https://usn.ubuntu.com/3626-1/