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Fencer Vulns
high 7.5

CVE-2022-30122 json

Denial of Service Vulnerability in Rack Multipart Parsing

published 2022-05-27 4 y ago modified 2026-06-17 4 mo ago also GHSA-hxqx-xwvh-44m2 , EUVD-2022-4248

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

A possible denial of service vulnerability exists in Rack <2.0.9.1, <2.1.4.1 and <2.2.3.1 in the multipart parsing component of Rack.

Patch / fix

  • rubygems rack 2.0.9.1, 2.1.4.1, 2.2.3.1
  • rack_project rack 2.0.9.1, 2.1.4.1, 2.2.3.1
  • ruby-rack Debian 14, Debian 13, Debian 12 2.2.4-1

debian advisories DEBIAN-CVE-2022-30122

  • ruby-rack Ubuntu 22.04 LTS 2.1.4-5ubuntu1.1
  • ruby-rack Ubuntu Pro 14.04 LTS 1.5.2-3+deb8u3ubuntu1~esm4
  • ruby-rack Ubuntu Pro 16.04 LTS 1.6.4-3ubuntu0.2+esm2
  • ruby-rack Ubuntu Pro 18.04 LTS 1.6.4-4ubuntu0.2+esm2
  • ruby-rack Ubuntu Pro 20.04 LTS 2.0.7-2ubuntu0.1+esm2
  • ruby-rack Ubuntu Pro 22.04 LTS 2.1.4-5ubuntu1+esm2

ubuntu advisories UBUNTU-CVE-2022-30122

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • grafana storage 3.5 5.2.4-6.el7rhgs
  • rubygem-puma storage 3.5 4.3.12-1.el7rhgs
  • rubygem-rack storage 3.5 2.2.4-1.el7rhgs
  • rubygem-tzinfo storage 3.5 1.2.10-1.el7rhgs
  • rubygem-rack satellite capsule 6.11, satellite 6.11 2.2.3.1-1.el8sat
  • rubygem-tzinfo satellite 6.11 1.2.10-1.el8sat
  • tfm-rubygem-rack satellite capsule 6.11, satellite 6.11 2.2.3.1-1.el7sat
  • tfm-rubygem-tzinfo satellite 6.11 1.2.10-1.el7sat

red hat advisories RHSA-2023:1486RHSA-2022:7242

  • rubygem-rack OpenStack Cloud Crowbar 9, OpenStack Cloud Crowbar 8 1.6.13-3.13.1
  • rubygem-rack SLE High Availability Extension 15 SP4, SLE High Availability Extension 15 SP3, SLE High Availability Extension 15 SP2 +4 more 2.0.8-150000.3.6.1

suse advisories SUSE-SU-2022:2526-1SUSE-SU-2022:2192-1

  • rubygem-rack openSUSE Tumbleweed 3.1.18-1.3
  • rubygem-rack-2.2 openSUSE Tumbleweed 2.2.22-1.1
  • rubygem-rack openSUSE Tumbleweed 3.1.12-1.1
  • rubygem-rack-2.2 openSUSE Tumbleweed 2.2.11-1.1
  • rubygem-rack openSUSE Tumbleweed 2.2.3.1-1.1
  • rubygem-rack-2.2 openSUSE Tumbleweed 2.2.4-1.1
  • ruby3.2-rubygem-rack-2.2 openSUSE Tumbleweed 2.2.7-1.1
  • ruby3.2-rubygem-rack openSUSE Tumbleweed 3.0.7-1.2

opensuse advisories openSUSE-SU-2026:10358-1openSUSE-SU-2026:10286-1openSUSE-SU-2025:14875-1openSUSE-SU-2025:14811-1openSUSE-SU-2024:12119-1openSUSE-SU-2024:12397-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-30122 updated cvss 7.5

rubygem-rack: crafted multipart POST request may cause a DoS

  • Red Hat Enterprise Linux 7 pcs, pcs-snmp, python-clufter
    affected: no fix planned “Out of support scope”
  • Red Hat Gluster 3.5 Web Administration on RHEL-7 rubygem-rack 2.2.4-1.el7rhgs
    fixed: vendor fix RHSA-2023:1486
  • Red Hat Satellite 6.11 for RHEL 7 tfm-rubygem-rack 2.2.3.1-1.el7sat Red Hat Satellite 6.11 for RHEL 8 rubygem-rack 2.2.3.1-1.el8sat
    fixed: vendor fix RHSA-2022:7242
  • Red Hat Gluster 3.5 Web Administration on RHEL-7 ruby 2.4.9-94.el7rhgs, grafana 5.2.4-6.el7rhgs, ruby-irb 2.4.9-94.el7rhgs, ruby-libs 2.4.9-94.el7rhgs, rubygem-i18n 1.9.1-1.el7rhgs, rubygems 2.6.14.4-94.el7rhgs, +28 more Red Hat Satellite 6.11 for RHEL 7 foreman 3.1.1.25-1.el7sat, satellite 6.11.4-2.el7sat, foreman-cli 3.1.1.25-1.el7sat, foreman-ec2 3.1.1.25-1.el7sat, foreman-gce 3.1.1.25-1.el7sat, satellite-cli 6.11.4-2.el7sat, +19 more Red Hat Satellite 6.11 for RHEL 8 foreman 3.1.1.25-1.el8sat, satellite 6.11.4-2.el8sat, foreman-cli 3.1.1.25-1.el8sat, foreman-ec2 3.1.1.25-1.el8sat, foreman-gce 3.1.1.25-1.el8sat, satellite-cli 6.11.4-2.el8sat, +19 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

2.23% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
rubygems rack
>=1.2, <2.0.9.1
>=2.1, <2.1.4.1
>=2.2, <2.2.3.1
2.0.9.1
2.1.4.1
2.2.3.1

Affected products

  • n/a https://github.com/rack/rack

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-1333 Inefficient Regular Expression Complexity

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.