Ruby 1.6.x up to 1.6.8, 1.8.x up to 1.8.2, and 1.9.0 development up to 2005-09-01 allows attackers to bypass safe level and taint flag prote
Ruby 1.6.x up to 1.6.8, 1.8.x up to 1.8.2, and 1.9.0 development up to 2005-09-01 allows attackers to bypass safe level and taint flag protections and execute disallowed code when Ruby processes a program through standard input (stdin).
- Published
- Oct 7, 2005
- Updated
- Jun 16, 2026
- EPSS
- 3.3% · 88th percentile
- CWE
- —
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| yukihiro matsumoto | ruby | cpe:2.3:a:yukihiro_matsumoto:ruby |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- yukihiro matsumoto ruby1.6
- yukihiro matsumoto ruby1.6.1
- yukihiro matsumoto ruby1.6.2
- yukihiro matsumoto ruby1.6.3
- yukihiro matsumoto ruby1.6.4
- yukihiro matsumoto ruby1.6.5
- yukihiro matsumoto ruby1.6.6
- yukihiro matsumoto ruby1.6.7
- yukihiro matsumoto ruby1.8
- yukihiro matsumoto ruby1.8.1
- yukihiro matsumoto ruby1.8.2_pre1
- yukihiro matsumoto ruby1.8.2_pre2
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:3.0 | ruby | before 1.6.7-3woody5 | 1.6.7-3woody5 |
| Debian:3.1 | ruby1.6 | before 1.6.8-12sarge1 | 1.6.8-12sarge1 |
| Debian:3.1 | ruby1.8 | before 1.8.2-7sarge2 | 1.8.2-7sarge2 |
| Red Hat:enterprise_linux:3::as | irb | before 0:1.6.8-9.EL3.4 | 0:1.6.8-9.EL3.4 |
| Red Hat:enterprise_linux:3::as | ruby | before 0:1.6.8-9.EL3.4 | 0:1.6.8-9.EL3.4 |
| Red Hat:enterprise_linux:3::as | ruby-debuginfo | before 0:1.6.8-9.EL3.4 | 0:1.6.8-9.EL3.4 |
| Red Hat:enterprise_linux:3::as | ruby-devel | before 0:1.6.8-9.EL3.4 | 0:1.6.8-9.EL3.4 |
| Red Hat:enterprise_linux:3::as | ruby-docs | before 0:1.6.8-9.EL3.4 | 0:1.6.8-9.EL3.4 |
| Red Hat:enterprise_linux:3::as | ruby-libs | before 0:1.6.8-9.EL3.4 | 0:1.6.8-9.EL3.4 |
| Red Hat:enterprise_linux:3::as | ruby-mode | before 0:1.6.8-9.EL3.4 | 0:1.6.8-9.EL3.4 |
| Red Hat:enterprise_linux:3::as | ruby-tcltk | before 0:1.6.8-9.EL3.4 | 0:1.6.8-9.EL3.4 |
| Red Hat:enterprise_linux:4::as | irb | before 0:1.8.1-7.EL4.2 | 0:1.8.1-7.EL4.2 |
| Red Hat:enterprise_linux:4::as | ruby | before 0:1.8.1-7.EL4.2 | 0:1.8.1-7.EL4.2 |
| Red Hat:enterprise_linux:4::as | ruby-debuginfo | before 0:1.8.1-7.EL4.2 | 0:1.8.1-7.EL4.2 |
| Red Hat:enterprise_linux:4::as | ruby-devel | before 0:1.8.1-7.EL4.2 | 0:1.8.1-7.EL4.2 |
| Red Hat:enterprise_linux:4::as | ruby-docs | before 0:1.8.1-7.EL4.2 | 0:1.8.1-7.EL4.2 |
| Red Hat:enterprise_linux:4::as | ruby-libs | before 0:1.8.1-7.EL4.2 | 0:1.8.1-7.EL4.2 |
| Red Hat:enterprise_linux:4::as | ruby-mode | before 0:1.8.1-7.EL4.2 | 0:1.8.1-7.EL4.2 |
| Red Hat:enterprise_linux:4::as | ruby-tcltk | before 0:1.8.1-7.EL4.2 | 0:1.8.1-7.EL4.2 |
Same product
yukihiro matsumoto: all recordsOther highest-scoring records for the same primary product.
- CVE-2005-1992The XMLRPC server in utils.rb for the ruby library (libruby) 1.8 sets an invalid default value that prevents "security protection" using han32Monitor
- CVE-2006-3694Multiple unspecified vulnerabilities in Ruby before 1.8.5 allow remote attackers to bypass "safe level" checks via unspecified vectors invol27Monitor
- CVE-2006-1931The HTTP/XMLRPC server in Ruby before 1.8.2 uses blocking sockets, which allows attackers to cause a denial of service (blocked connections)23Monitor
- CVE-2006-6303The read_multipart function in cgi.rb in Ruby before 1.8.5-p2 does not properly detect boundaries in MIME multipart content, which allows re21Monitor
- CVE-2006-5467The cgi.rb CGI library for Ruby 1.8 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via an HTTP req21Monitor
- CVE-2004-0983The 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 c21Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:ruby | 1.6.7-3woody5 · Debian:3.0 | Package registry (OSV) |
| debian:ruby1.6 | 1.6.8-12sarge1 · Debian:3.1 | Package registry (OSV) |
| debian:ruby1.8 | 1.8.2-7sarge2 · Debian:3.1 | Package registry (OSV) |
| red hat:irb | 0:1.6.8-9.EL3.4 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:ruby | 0:1.6.8-9.EL3.4 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:ruby-debuginfo | 0:1.6.8-9.EL3.4 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:ruby-devel | 0:1.6.8-9.EL3.4 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:ruby-docs | 0:1.6.8-9.EL3.4 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:ruby-libs | 0:1.6.8-9.EL3.4 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:ruby-mode | 0:1.6.8-9.EL3.4 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:ruby-tcltk | 0:1.6.8-9.EL3.4 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
—
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
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References
- jvn.jp/jp/JVN%2362914675/index.html
- lists.apple.com/archives/security-announce/2006/May/msg00003.html
- secunia.com/advisories/16904
- secunia.com/advisories/17094
- secunia.com/advisories/17098
- secunia.com/advisories/17129
- secunia.com/advisories/17147
- secunia.com/advisories/17285
- secunia.com/advisories/19130
- secunia.com/advisories/20077
- securityreason.com/securityalert/59
- www.debian.org/security/2005/dsa-860
- www.debian.org/security/2005/dsa-862
- www.debian.org/security/2005/dsa-864
- www.gentoo.org/security/en/glsa/glsa-200510-05.xml
- www.kb.cert.org/vuls/id/160012
- www.mandriva.com/security/advisories?name=MDKSA-2005:191
- www.novell.com/linux/security/advisories/2006_05_sr.html
- www.redhat.com/support/errata/RHSA-2005-799.html
- www.ruby-lang.org/en/20051003.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.