Arbitrary Command Injection Affecting rubygem-psych package, versions <0:2.0.0-33.el7_4
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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Start learning- Snyk IDSNYK-CENTOS7-RUBYGEMPSYCH-2096788
- published26 Jul 2021
- disclosed19 Dec 2017
Introduced: 19 Dec 2017
CVE-2017-17790 (opens in a new tab)How to fix?
Upgrade Centos:7 rubygem-psych to version 0:2.0.0-33.el7_4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rubygem-psych package and not the rubygem-psych package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
The lazy_initialize function in lib/resolv.rb in Ruby through 2.4.3 uses Kernel#open, which might allow Command Injection attacks, as demonstrated by a Resolv::Hosts::new argument beginning with a '|' character, a different vulnerability than CVE-2017-17405. NOTE: situations with untrusted input may be highly unlikely.
References
- https://github.com/ruby/ruby/pull/1777
- https://access.redhat.com/security/cve/CVE-2017-17790
- https://www.debian.org/security/2018/dsa-4259
- https://lists.debian.org/debian-lts-announce/2017/12/msg00024.html
- https://lists.debian.org/debian-lts-announce/2017/12/msg00025.html
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
- https://access.redhat.com/errata/RHSA-2018:0378