Improper Input Validation Affecting ruby-libs package, versions <0:2.0.0.648-33.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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Test your applications- Snyk IDSNYK-RHEL7-RUBYLIBS-4789115
- published26 Jul 2021
- disclosed10 Oct 2017
Introduced: 10 Oct 2017
CVE-2017-0903 (opens in a new tab)How to fix?
Upgrade RHEL:7 ruby-libs to version 0:2.0.0.648-33.el7_4 or higher.
This issue was patched in RHSA-2018:0378.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby-libs package and not the ruby-libs package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution.
References
- http://www.securityfocus.com/bid/101275
- https://access.redhat.com/security/cve/CVE-2017-0903
- https://www.debian.org/security/2017/dsa-4031
- http://blog.rubygems.org/2017/10/09/2.6.14-released.html
- http://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html
- https://github.com/rubygems/rubygems/commit/510b1638ac9bba3ceb7a5d73135dafff9e5bab49
- https://hackerone.com/reports/274990
- https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
- https://access.redhat.com/errata/RHSA-2018:0378
- https://usn.ubuntu.com/3553-1/
- https://usn.ubuntu.com/3685-1/