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TI-2018-06327 Aliases CVE-2018-8777GHSA-9j6f-82h4-9mw2

In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and…

Priority MEDIUM 40CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 31 fixed, 5 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker can pass a large HTTP request with a crafted header to WEBrick server or a crafted body to WEBrick server/handler and cause a denial of service (memory consumption).

Why it matters now

EPSS 0.04458 91st percentileScored 2026-11-07
Fix Partial Red Hat: 7 advisoriesRed Hat: 31 fixed, 5 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*2.2.0 to before 2.2.10; 2.3.0 to before 2.3.7; 2.4.0 to before 2.4.4; 2.5.0 to before 2.5.1Vulnerableruby
cpe:2.3:a:ruby-lang:ruby:2.6.0:preview1:*:*:*:*:*:*2.6.0 preview1Vulnerableruby
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*17.10VulnerableCanonical
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* Versions 2.2.0 to before 2.2.10; 2.3.0 to before 2.3.7; 2.4.0 to before 2.4.4; 2.5.0 to before 2.5.1 Vulnerable ·ruby
  • cpe:2.3:a:ruby-lang:ruby:2.6.0:preview1:*:*:*:*:*:* Versions 2.6.0 preview1 Vulnerable ·ruby
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat

Remediation

Red Hat 7 advisories

  • RHSA-2020:0663 Released 2020-03-03 · Red Hat rating Moderate
    ruby security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) ruby-2.0.0.648-36.el7_6, ruby-irb-2.0.0.648-36.el7_6, ruby-libs-2.0.0.648-36.el7_6 +6
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) ruby-devel-2.0.0.648-36.el7_6, ruby-doc-2.0.0.648-36.el7_6, ruby-tcltk-2.0.0.648-36.el7_6 +3
    • Red Hat Enterprise Linux Server EUS (v. 7.6) ruby-2.0.0.648-36.el7_6, ruby-irb-2.0.0.648-36.el7_6, ruby-libs-2.0.0.648-36.el7_6 +7
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) ruby-devel-2.0.0.648-36.el7_6, ruby-doc-2.0.0.648-36.el7_6, ruby-tcltk-2.0.0.648-36.el7_6 +3
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) ruby-2.0.0.648-36.el7_6, ruby-irb-2.0.0.648-36.el7_6, ruby-libs-2.0.0.648-36.el7_6 +6
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) ruby-devel-2.0.0.648-36.el7_6, ruby-doc-2.0.0.648-36.el7_6, ruby-tcltk-2.0.0.648-36.el7_6 +3
  • RHSA-2020:0591 Released 2020-02-25 · Red Hat rating Moderate
    ruby security update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) ruby-2.0.0.648-35.el7_4, ruby-irb-2.0.0.648-35.el7_4, ruby-libs-2.0.0.648-35.el7_4 +6
    • Red Hat Enterprise Linux Server E4S (v. 7.4) ruby-2.0.0.648-35.el7_4, ruby-irb-2.0.0.648-35.el7_4, ruby-libs-2.0.0.648-35.el7_4 +6
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) ruby-devel-2.0.0.648-35.el7_4, ruby-doc-2.0.0.648-35.el7_4, ruby-tcltk-2.0.0.648-35.el7_4 +3
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) ruby-devel-2.0.0.648-35.el7_4, ruby-doc-2.0.0.648-35.el7_4, ruby-tcltk-2.0.0.648-35.el7_4 +3
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) ruby-devel-2.0.0.648-35.el7_4, ruby-doc-2.0.0.648-35.el7_4, ruby-tcltk-2.0.0.648-35.el7_4 +3
    • Red Hat Enterprise Linux Server TUS (v. 7.4) ruby-2.0.0.648-35.el7_4, ruby-irb-2.0.0.648-35.el7_4, ruby-libs-2.0.0.648-35.el7_4 +6
  • RHSA-2020:0542 Released 2020-02-19 · Red Hat rating Moderate
    ruby security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) ruby-2.0.0.648-35.el7_5, ruby-irb-2.0.0.648-35.el7_5, ruby-libs-2.0.0.648-35.el7_5 +6
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) ruby-devel-2.0.0.648-35.el7_5, ruby-doc-2.0.0.648-35.el7_5, ruby-tcltk-2.0.0.648-35.el7_5 +3
    • Red Hat Enterprise Linux Server EUS (v. 7.5) ruby-2.0.0.648-35.el7_5, ruby-irb-2.0.0.648-35.el7_5, ruby-libs-2.0.0.648-35.el7_5 +7
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.5) ruby-devel-2.0.0.648-35.el7_5, ruby-doc-2.0.0.648-35.el7_5, ruby-tcltk-2.0.0.648-35.el7_5 +3
Show 4 more Red Hat advisories
  • RHSA-2019:2028 Released 2019-08-06 · Red Hat rating Moderate
    ruby security update
    • Red Hat Enterprise Linux Client (v. 7) ruby-2.0.0.648-36.el7, ruby-irb-2.0.0.648-36.el7, ruby-libs-2.0.0.648-36.el7 +6
    • Red Hat Enterprise Linux Client Optional (v. 7) ruby-devel-2.0.0.648-36.el7, ruby-doc-2.0.0.648-36.el7, ruby-tcltk-2.0.0.648-36.el7 +3
    • Red Hat Enterprise Linux ComputeNode (v. 7) ruby-2.0.0.648-36.el7, ruby-irb-2.0.0.648-36.el7, ruby-libs-2.0.0.648-36.el7 +6
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) ruby-devel-2.0.0.648-36.el7, ruby-doc-2.0.0.648-36.el7, ruby-tcltk-2.0.0.648-36.el7 +3
    • Red Hat Enterprise Linux Server (v. 7) ruby-2.0.0.648-36.el7, ruby-irb-2.0.0.648-36.el7, ruby-libs-2.0.0.648-36.el7 +7
    • Red Hat Enterprise Linux Server Optional (v. 7) ruby-devel-2.0.0.648-36.el7, ruby-doc-2.0.0.648-36.el7, ruby-tcltk-2.0.0.648-36.el7 +3
    • Red Hat Enterprise Linux Workstation (v. 7) ruby-2.0.0.648-36.el7, ruby-irb-2.0.0.648-36.el7, ruby-libs-2.0.0.648-36.el7 +6
    • Red Hat Enterprise Linux Workstation Optional (v. 7) ruby-devel-2.0.0.648-36.el7, ruby-doc-2.0.0.648-36.el7, ruby-tcltk-2.0.0.648-36.el7 +3
  • RHSA-2018:3731 Released 2018-11-29 · Red Hat rating Important
    rh-ruby25-ruby security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-ruby25-ruby-2.5.3-6.el7, rh-ruby25-ruby-devel-2.5.3-6.el7, rh-ruby25-ruby-doc-2.5.3-6.el7 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-ruby25-ruby-2.5.3-6.el7, rh-ruby25-ruby-devel-2.5.3-6.el7, rh-ruby25-ruby-doc-2.5.3-6.el7 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-ruby25-ruby-2.5.3-6.el7, rh-ruby25-ruby-devel-2.5.3-6.el7, rh-ruby25-ruby-doc-2.5.3-6.el7 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-ruby25-ruby-2.5.3-6.el7, rh-ruby25-ruby-devel-2.5.3-6.el7, rh-ruby25-ruby-doc-2.5.3-6.el7 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-ruby25-ruby-2.5.3-6.el7, rh-ruby25-ruby-devel-2.5.3-6.el7, rh-ruby25-ruby-doc-2.5.3-6.el7 +17
  • RHSA-2018:3730 Released 2018-11-29 · Red Hat rating Important
    rh-ruby24-ruby security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-ruby24-ruby-2.4.5-91.el6, rh-ruby24-ruby-devel-2.4.5-91.el6, rh-ruby24-ruby-doc-2.4.5-91.el6 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-ruby24-ruby-2.4.5-91.el7, rh-ruby24-ruby-devel-2.4.5-91.el7, rh-ruby24-ruby-doc-2.4.5-91.el7 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-ruby24-ruby-2.4.5-91.el7, rh-ruby24-ruby-devel-2.4.5-91.el7, rh-ruby24-ruby-doc-2.4.5-91.el7 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-ruby24-ruby-2.4.5-91.el7, rh-ruby24-ruby-devel-2.4.5-91.el7, rh-ruby24-ruby-doc-2.4.5-91.el7 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-ruby24-ruby-2.4.5-91.el7, rh-ruby24-ruby-devel-2.4.5-91.el7, rh-ruby24-ruby-doc-2.4.5-91.el7 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-ruby24-ruby-2.4.5-91.el6, rh-ruby24-ruby-devel-2.4.5-91.el6, rh-ruby24-ruby-doc-2.4.5-91.el6 +17
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-ruby24-ruby-2.4.5-91.el7, rh-ruby24-ruby-devel-2.4.5-91.el7, rh-ruby24-ruby-doc-2.4.5-91.el7 +17
  • RHSA-2018:3729 Released 2018-11-29 · Red Hat rating Important
    rh-ruby23-ruby security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-ruby23-ruby-2.3.8-69.el6, rh-ruby23-ruby-devel-2.3.8-69.el6, rh-ruby23-ruby-doc-2.3.8-69.el6 +16
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-ruby23-ruby-2.3.8-69.el7, rh-ruby23-ruby-devel-2.3.8-69.el7, rh-ruby23-ruby-doc-2.3.8-69.el7 +16
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-ruby23-ruby-2.3.8-69.el7, rh-ruby23-ruby-devel-2.3.8-69.el7, rh-ruby23-ruby-doc-2.3.8-69.el7 +16
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-ruby23-ruby-2.3.8-69.el7, rh-ruby23-ruby-devel-2.3.8-69.el7, rh-ruby23-ruby-doc-2.3.8-69.el7 +16
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-ruby23-ruby-2.3.8-69.el7, rh-ruby23-ruby-devel-2.3.8-69.el7, rh-ruby23-ruby-doc-2.3.8-69.el7 +16
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-ruby23-ruby-2.3.8-69.el6, rh-ruby23-ruby-devel-2.3.8-69.el6, rh-ruby23-ruby-doc-2.3.8-69.el6 +16
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-ruby23-ruby-2.3.8-69.el7, rh-ruby23-ruby-devel-2.3.8-69.el7, rh-ruby23-ruby-doc-2.3.8-69.el7 +16

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
CloudForms Management Engine 5AffectedNo fix yet
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Software CollectionsAffectedNo fix planned: Will not fix
Red Hat Subscription Asset ManagerAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:2028
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:2028
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2019:2028
Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)Fixed RHSA-2020:0542
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)Fixed RHSA-2020:0663
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:2028
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5)Fixed RHSA-2020:0542
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6)Fixed RHSA-2020:0663
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:2028
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2020:0591
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2020:0591
Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2020:0542
Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2020:0663
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:2028
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2020:0591
Red Hat Enterprise Linux Server Optional E4S (v. 7.4)Fixed RHSA-2020:0591
Red Hat Enterprise Linux Server Optional EUS (v. 7.5)Fixed RHSA-2020:0542
Red Hat Enterprise Linux Server Optional EUS (v. 7.6)Fixed RHSA-2020:0663
Red Hat Enterprise Linux Server Optional TUS (v. 7.4)Fixed RHSA-2020:0591
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2020:0591
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:2028
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:2028
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2020:0663
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2020:0663
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:3729, RHSA-2018:3730
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3729, RHSA-2018:3730, RHSA-2018:3731
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2018:3729, RHSA-2018:3730, RHSA-2018:3731
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2018:3729, RHSA-2018:3730, RHSA-2018:3731
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2018:3729, RHSA-2018:3730, RHSA-2018:3731
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:3729, RHSA-2018:3730
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3729, RHSA-2018:3730, RHSA-2018:3731
Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-8777
  2. 2026-10-03 Alias added: GHSA-9j6f-82h4-9mw2

References

Patch 4

Advisory 14

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences