There is a possible DoS vulnerability in the multipart parser in Rack before 2.0.6. Specially crafted requests can cause the multipart parser to enter a pathological state, causing the parser to use CPU resources disproportionate to the request size.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-16470 from the MITRE CVE dictionary dictionary and NIST NVD.
OpenShift Enterprise and Red Hat OpenStack Platform optools both ship rubygem-rack 1.5.2, which is not affected by this flaw.
Red Hat Subscription Asset Manager uses rubygem-rack 1.4.5, and is not affected by this flaw.
Red Hat Update Infrastructure ships rubygem-rack version 1.4.2, which is not affected by this flaw.
Red Hat CloudForms versions 4.5 and 4.6 ship rack version 2.0.3, which is not affected by this flaw; while Red Hat CloudForms version 4.7 ships rack version 2.0.6, which already contains the fix for this flaw.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 5.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | Low |
| Platform | Package | State |
|---|---|---|
| Red Hat Subscription Asset Manager 1 | ruby193-rubygem-rack | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ror50-rubygem-rack | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ror42-rubygem-rack | Not affected |
| Red Hat Satellite 6 | rubygem-rack | Not affected |
| Red Hat Satellite 6 | tfm-ror51-rubygem-rack | Affected |
| Red Hat OpenStack Platform Operational Tools 9 | rubygem-rack | Not affected |
| Red Hat OpenStack Platform Operational Tools 14 | rubygem-rack | Not affected |
| Red Hat OpenStack Platform 13.0 Operational Tools for RHEL 7 | rubygem-rack | Not affected |
| Red Hat OpenStack Platform 12.0 Operational Tools for RHEL 7 | rubygem-rack | Not affected |
| Red Hat OpenStack Platform 10.0 Operational Tools for RHEL 7 | rubygem-rack | Not affected |
| Red Hat OpenShift Enterprise 3.2 | rubygem-rack | Not affected |
| Red Hat OpenShift Enterprise 3.1 | rubygem-rack | Not affected |
| Red Hat OpenShift Container Platform 3.4 | rubygem-rack | Not affected |
| Red Hat OpenShift Container Platform 3.3 | rubygem-rack | Not affected |
| Red Hat Gluster Storage 3 | rubygem-rack | Not affected |
| Red Hat Enterprise Linux OpenStack Platform 8.0 Operational Tools for RHEL 7 | rubygem-rack | Not affected |
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