CVE-2017-0903

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 4.33% Top 15%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory rubygems.org Vendor Advisory rubygems.org
Affected: HackerOne RubyGems
Published at:
Updated at:

References

Link Tags
https://usn.ubuntu.com/3685-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3553-1/ third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2018:0585 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2018:0378 third party advisory vendor advisory
https://hackerone.com/reports/274990 third party advisory
https://www.debian.org/security/2017/dsa-4031 third party advisory vendor advisory
https://github.com/rubygems/rubygems/commit/510b1638ac9bba3ceb7a5d73135dafff9e5bab49 third party advisory patch
https://access.redhat.com/errata/RHSA-2017:3485 third party advisory vendor advisory
http://blog.rubygems.org/2017/10/09/2.6.14-released.html vendor advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html third party advisory mailing list
https://access.redhat.com/errata/RHSA-2018:0583 third party advisory vendor advisory
http://www.securityfocus.com/bid/101275 third party advisory vdb entry
http://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-0903?
CVE-2017-0903 has been scored as a critical severity vulnerability.
How to fix CVE-2017-0903?
To fix CVE-2017-0903, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-0903 being actively exploited in the wild?
It is possible that CVE-2017-0903 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-0903?
CVE-2017-0903 affects HackerOne RubyGems.
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