The CGI module in Ruby 1.6 before 1.6.8, and 1.8 before 1.8.2, allows remote attackers to…
Priority LOW 27Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
The CGI module in Ruby 1.6 before 1.6.8, and 1.8 before 1.8.2, allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a certain HTTP request.
Why it matters now
EPSS 0.01898 79th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 17
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:yukihiro_matsumoto:ruby:1.6:*:*:*:*:*:*:* | 1.6 | Vulnerable | Yukihiro Matsumoto |
| cpe:2.3:a:yukihiro_matsumoto:ruby:1.6.7:*:*:*:*:*:*:* | 1.6.7 | Vulnerable | Yukihiro Matsumoto |
| cpe:2.3:a:yukihiro_matsumoto:ruby:1.8:*:*:*:*:*:*:* | 1.8 | Vulnerable | Yukihiro Matsumoto |
| cpe:2.3:a:yukihiro_matsumoto:ruby:1.8.1:*:*:*:*:*:*:* | 1.8.1 | Vulnerable | Yukihiro Matsumoto |
| cpe:2.3:a:yukihiro_matsumoto:ruby:1.8.2_pre1:*:*:*:*:*:*:* | 1.8.2_pre1 | Vulnerable | Yukihiro Matsumoto |
| cpe:2.3:a:yukihiro_matsumoto:ruby:1.8.2_pre2:*:*:*:*:*:*:* | 1.8.2_pre2 | Vulnerable | Yukihiro Matsumoto |
| cpe:2.3:o:gentoo:linux:*:*:*:*:*:*:*:* | all versions | Vulnerable | gentoo |
| cpe:2.3:o:mandrakesoft:mandrake_linux:9.2:*:*:*:*:*:*:* | 9.2 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux:9.2:*:amd64:*:*:*:*:* | 9.2 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Mandrakesoft |
- cpe:2.3:a:yukihiro_matsumoto:ruby:1.6:*:*:*:*:*:*:* Versions 1.6 Vulnerable ·Yukihiro Matsumoto
- cpe:2.3:a:yukihiro_matsumoto:ruby:1.6.7:*:*:*:*:*:*:* Versions 1.6.7 Vulnerable ·Yukihiro Matsumoto
- cpe:2.3:a:yukihiro_matsumoto:ruby:1.8:*:*:*:*:*:*:* Versions 1.8 Vulnerable ·Yukihiro Matsumoto
- cpe:2.3:a:yukihiro_matsumoto:ruby:1.8.1:*:*:*:*:*:*:* Versions 1.8.1 Vulnerable ·Yukihiro Matsumoto
- cpe:2.3:a:yukihiro_matsumoto:ruby:1.8.2_pre1:*:*:*:*:*:*:* Versions 1.8.2_pre1 Vulnerable ·Yukihiro Matsumoto
- cpe:2.3:a:yukihiro_matsumoto:ruby:1.8.2_pre2:*:*:*:*:*:*:* Versions 1.8.2_pre2 Vulnerable ·Yukihiro Matsumoto
- cpe:2.3:o:gentoo:linux:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·gentoo
- cpe:2.3:o:mandrakesoft:mandrake_linux:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux:9.2:*:amd64:*:*:*:*:* Versions 9.2 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Mandrakesoft
Show 7 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:mandrakesoft:mandrake_linux:10.0:*:amd64:*:*:*:*:* | 10.0 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux:10.1:*:*:*:*:*:*:* | 10.1 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux:10.1:*:x86_64:*:*:*:*:* | 10.1 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux_corporate_server:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:mandrakesoft:mandrake_linux_corporate_server:2.1:*:x86_64:*:*:*:*:* | 2.1 | Vulnerable | Mandrakesoft |
| cpe:2.3:o:ubuntu:ubuntu_linux:4.1:*:ia64:*:*:*:*:* | 4.1 | Vulnerable | Ubuntu |
| cpe:2.3:o:ubuntu:ubuntu_linux:4.1:*:ppc:*:*:*:*:* | 4.1 | Vulnerable | Ubuntu |
- cpe:2.3:o:mandrakesoft:mandrake_linux:10.0:*:amd64:*:*:*:*:* Versions 10.0 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux:10.1:*:*:*:*:*:*:* Versions 10.1 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux:10.1:*:x86_64:*:*:*:*:* Versions 10.1 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux_corporate_server:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·Mandrakesoft
- cpe:2.3:o:mandrakesoft:mandrake_linux_corporate_server:2.1:*:x86_64:*:*:*:*:* Versions 2.1 Vulnerable ·Mandrakesoft
- cpe:2.3:o:ubuntu:ubuntu_linux:4.1:*:ia64:*:*:*:*:* Versions 4.1 Vulnerable ·Ubuntu
- cpe:2.3:o:ubuntu:ubuntu_linux:4.1:*:ppc:*:*:*:*:* Versions 4.1 Vulnerable ·Ubuntu
Remediation
Red Hat 1 advisory
- RHSA-2004:635 Released 2004-12-13 · Red Hat rating Moderateruby security update
- Red Hat Desktop version 3 irb-1.6.8-9.EL3.3, irb-1.6.8-9.EL3.3.i386, ruby-1.6.8-9.EL3.3 +11
- Red Hat Enterprise Linux AS version 3 irb-1.6.8-9.EL3.3, irb-1.6.8-9.EL3.3.i386, irb-1.6.8-9.EL3.3.ia64 +25
- Red Hat Enterprise Linux ES version 3 irb-1.6.8-9.EL3.3, irb-1.6.8-9.EL3.3.i386, irb-1.6.8-9.EL3.3.ia64 +18
- Red Hat Enterprise Linux WS version 3 irb-1.6.8-9.EL3.3, irb-1.6.8-9.EL3.3.i386, irb-1.6.8-9.EL3.3.ia64 +18
Vendor assessments
Red Hat
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Desktop version 3 | Fixed | RHSA-2004:635 |
| Red Hat Enterprise Linux AS version 3 | Fixed | RHSA-2004:635 |
| Red Hat Enterprise Linux ES version 3 | Fixed | RHSA-2004:635 |
| Red Hat Enterprise Linux WS version 3 | Fixed | RHSA-2004:635 |
Timeline
- 2026-10-02 Threatist record created from CVE-2004-0983
- 2026-10-03 Alias added: GHSA-f94p-wf3v-wp5p
References
Sources
- CVE-2004-0983 · CVE Program
- CVE-2004-0983 · NVD
- FIRST EPSS
- GHSA-f94p-wf3v-wp5p · GitHub Advisory Database · CC BY 4.0
- CVE-2004-0983 · Red Hat security data · CC BY 4.0
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