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Fencer Vulns
medium 5.3

CVE-2023-28755 json

Ruby URI component ReDoS issue

published 2023-03-31 3 y ago modified 2026-09-10 1 mo ago also GHSA-hv5j-3h9f-99c2 , EUVD-2023-1038

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

A ReDoS issue was discovered in the URI component through 0.12.0 in Ruby through 3.2.1. The URI parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to URI objects. The fixed versions are 0.12.1, 0.11.1, 0.10.2 and 0.10.0.1.

Patch / fix

  • rubygems uri 0.10.0.1, 0.10.2, 0.11.1, 0.12.1
  • jruby Debian 14, Debian 13 9.4.5.0+ds-1
  • rubygems Debian 12 3.3.15-2+deb12u1
  • rubygems Debian 14, Debian 13 3.4.20-1

debian advisories DEBIAN-CVE-2023-28755

  • ruby2.5 Ubuntu 18.04 LTS 2.5.1-1ubuntu1.16
  • ruby2.7 Ubuntu 20.04 LTS 2.7.0-5ubuntu1.11
  • ruby3.0 Ubuntu 22.04 LTS 3.0.2-7ubuntu2.4
  • rubygems Ubuntu 22.04 LTS 3.3.5-2ubuntu1.1
  • ruby2.3 Ubuntu Pro 16.04 LTS 2.3.1-2~ubuntu16.04.16+esm7

ubuntu advisories UBUNTU-CVE-2023-28755

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

  • ruby RHEL 9 3.1.4-143.module+el9.3.0+21558+96b51efd
  • rubygems RHEL 9 3.3.26-143.module+el9.3.0+21558+96b51efd
  • ruby-libs RHEL 9 3.1.4-143.module+el9.3.0+21558+96b51efd
  • rubygem-pg RHEL 9 1.3.5-1.module+el9.1.0+15737+76195479
  • rubygem-irb RHEL 9 1.4.1-143.module+el9.3.0+21558+96b51efd
  • rubygem-rbs RHEL 9 2.7.0-143.module+el9.3.0+21558+96b51efd
  • rubygem-rss RHEL 9 0.2.9-143.module+el9.3.0+21558+96b51efd
  • rubygem-json RHEL 9 2.6.1-143.module+el9.3.0+21558+96b51efd

red hat advisories RHSA-2024:1576RHSA-2024:1431RHSA-2023:7025RHSA-2024:3838RHSA-2024:3500RHSA-2023:3821

  • ruby2.5 SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES for SAP 15 SP1 +14 more 2.5.9-150000.4.29.1

suse advisories SUSE-SU-2023:4176-1

  • ruby4.0 openSUSE Tumbleweed 4.0.0~preview2-1.1
  • ruby3.4 openSUSE Tumbleweed 3.4.1-1.1
  • ruby3.2 openSUSE Tumbleweed 3.2.2-1.1
  • ruby3.1 openSUSE Tumbleweed 3.1.4-1.1
  • ruby3.3 openSUSE Tumbleweed 3.3.0-1.2

opensuse advisories openSUSE-SU-2025:15819-1openSUSE-SU-2025:14621-1openSUSE-SU-2024:12828-1openSUSE-SU-2024:12849-1openSUSE-SU-2024:13623-1

  • ruby AlmaLinux 8 2.5.9-112.module_el8.10.0+3871+342e2c2f
  • ruby-irb AlmaLinux 8 2.5.9-112.module_el8.10.0+3871+342e2c2f
  • rubygems AlmaLinux 8 2.7.6.3-112.module_el8.10.0+3871+342e2c2f
  • ruby-libs AlmaLinux 8 2.5.9-112.module_el8.10.0+3871+342e2c2f
  • rubygem-pg AlmaLinux 8 1.0.0-3.module_el8.9.0+3635+c6f99506
  • rubygem-abrt AlmaLinux 8 0.3.0-4.module_el8.10.0+3871+342e2c2f
  • rubygem-bson AlmaLinux 8 4.3.0-2.module_el8.5.0+2625+ec418553
  • rubygem-bson AlmaLinux 8 4.3.0-2.module_el8.6.0+3170+4b08f9d4

almalinux advisories ALSA-2024:4499ALSA-2024:3838ALSA-2024:3500ALSA-2024:1576ALSA-2024:1431ALSA-2023:7025

  • ruby Rocky Linux 8 2.5.9-111.module+el8.9.0+1536+5f79634e
  • rubygem-pg Rocky Linux 8 1.0.0-3.module+el8.9.0+1536+5f79634e
  • rubygem-abrt Rocky Linux 8 0.3.0-4.module+el8.9.0+1536+5f79634e
  • rubygem-abrt Rocky Linux 8 0.3.0-4.module+el8.5.0+738+032c9c02
  • rubygem-bson Rocky Linux 8 4.3.0-2.module+el8.9.0+1536+5f79634e
  • rubygem-mongo Rocky Linux 8 2.5.1-2.module+el8.9.0+1536+5f79634e
  • rubygem-mysql2 Rocky Linux 8 0.4.10-4.module+el8.9.0+1536+5f79634e
  • rubygem-bundler Rocky Linux 8 1.16.1-4.module+el8.9.0+1536+5f79634e

rocky linux advisories RLSA-2023:7025RLSA-2024:1576RLSA-2024:1431RLSA-2023:3821

  • ruby Alpine 3.14 2.7.8-r0
  • ruby Alpine 3.15 3.0.6-r0
  • ruby Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 3.1.4-r0

alpine advisories ALPINE-CVE-2023-28755

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2023-28755 updated cvss 5.3

ruby: ReDoS vulnerability in URI

  • Red Hat Enterprise Linux 6 ruby, ruby-ri, ruby-irb, ruby-libs, ruby-rdoc, ruby-tcltk Red Hat Enterprise Linux 7 ruby, ruby-irb, rubygems, ruby-libs, ruby-tcltk, rubygem-json, +6 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 ruby, ruby-irb, rubygems, ruby-libs, rubygem-pg, rubygem-irb, +25 more Red Hat Software Collections rh-ruby30-ruby, rh-ruby30-rubygems, rh-ruby30-ruby-libs, rh-ruby30-rubygem-irb, rh-ruby30-rubygem-rbs, rh-ruby30-rubygem-rss, +12 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) ruby 2.5.9-111.module+el8.9.0+19193+435404ae, ruby 2.7.8-139.module+el8.8.0+18745+f1bef313, ruby 3.1.4-142.module+el8.9.0+21471+7d1e4a35, ruby 3.0.7-143.module+el8.10.0+21858+d19f3934, rubygem-pg 1.2.3-1.module+el8.3.0+7192+4e3a532a, ruby-irb 2.5.9-111.module+el8.9.0+19193+435404ae, +85 more
    fixed: vendor fix RHSA-2024:3500
  • Red Hat Enterprise Linux AppStream (v. 9) ruby 3.0.7-162.el9_4, ruby-libs 3.0.7-162.el9_4, rubygems 3.2.33-162.el9_4, rubygem-irb 1.3.5-162.el9_4, rubygem-rbs 1.4.0-162.el9_4, rubygem-rss 0.2.9-162.el9_4, +35 more
    fixed: vendor fix RHSA-2024:1576
  • Red Hat Enterprise Linux CRB (v. 9) ruby-doc 3.0.7-162.el9_4
    fixed: vendor fix RHSA-2024:3838
  • Red Hat Software Collections for RHEL Workstation(v. 7) rh-ruby27-ruby 2.7.8-132.el7, rh-ruby27-rubygems 3.1.6-132.el7, rh-ruby27-ruby-libs 2.7.8-132.el7, rh-ruby27-rubygem-irb 1.2.6-132.el7, rh-ruby27-rubygem-json 2.3.0-132.el7, rh-ruby27-rubygem-psych 3.1.0-132.el7, +13 more Red Hat Software Collections for RHEL(v. 7) rh-ruby27-ruby 2.7.8-132.el7, rh-ruby27-rubygems 3.1.6-132.el7, rh-ruby27-ruby-libs 2.7.8-132.el7, rh-ruby27-rubygem-irb 1.2.6-132.el7, rh-ruby27-rubygem-json 2.3.0-132.el7, rh-ruby27-rubygem-psych 3.1.0-132.el7, +13 more
    fixed: vendor fix RHSA-2023:3291

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
20 mo ago

Exploit prediction

2.64% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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 uri
>=0.12.0, <0.12.1
>=0.11.0, <0.11.1
>=0.10.1, <0.10.2
<0.10.0.1
0.12.1
0.11.1
0.10.2
0.10.0.1

Classification

Weakness
  • 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.