What’s Vulnerable › Vulnerabilities

CVE-2017-0903

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 15.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-10-11 · updated 2026-06-17
• Weakness: CWE-502

Description

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• Debian Linux: 8.0, 9.0
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Server Aus: 7.4, 7.6
• RedHat Enterprise Linux Server Eus: 7.4, 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.4, 7.6
• RedHat Enterprise Linux Workstation: 7.0
• rubygems: 2.0.0, 2.0.0-preview2, 2.0.0-preview2.1, 2.0.0-preview2.2, 2.0.0-rc1, 2.0.0-rc2 (+66)

References

• http://blog.rubygems.org/2017/10/09/2.6.14-released.html
• http://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html
• http://www.securityfocus.com/bid/101275
• https://access.redhat.com/errata/RHSA-2017:3485
• https://access.redhat.com/errata/RHSA-2018:0378
• https://access.redhat.com/errata/RHSA-2018:0583
• https://access.redhat.com/errata/RHSA-2018:0585
• https://github.com/rubygems/rubygems/commit/510b1638ac9bba3ceb7a5d73135dafff9e5bab49
• https://hackerone.com/reports/274990
• https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
• https://usn.ubuntu.com/3553-1/
• https://usn.ubuntu.com/3685-1/

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