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Fencer Vulns
medium 5.0

CVE-2006-5467 json

The 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 re…

published 2006-10-27 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-5452

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.5%
EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

The 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 request with a multipart MIME body that contains an invalid boundary specifier, as demonstrated using a specifier that begins with a "-" instead of "--" and contains an inconsistent ID.

Patch / fix

  • ruby RHEL 2.1 1.6.4-2.AS21.4
  • ruby RHEL 3 1.6.8-9.EL3.8
  • ruby RHEL 4 1.8.1-7.EL4.8
  • irb RHEL 2.1 1.6.4-2.AS21.4
  • irb RHEL 3 1.6.8-9.EL3.8
  • irb RHEL 4 1.8.1-7.EL4.8
  • ruby-libs RHEL 2.1 1.6.4-2.AS21.4
  • ruby-libs RHEL 3 1.6.8-9.EL3.8

red hat advisories RHSA-2006:0729

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-2006-5467 updated

Ruby CGI multipart parsing DoS

  • Red Hat Desktop version 3 irb 1.6.8-9.EL3.8, ruby 1.6.8-9.EL3.8, ruby-libs 1.6.8-9.EL3.8, ruby-mode 1.6.8-9.EL3.8, ruby-tcltk 1.6.8-9.EL3.8 Red Hat Enterprise Linux AS (Advanced Server) version 2.1 irb 1.6.4-2.AS21.4, ruby 1.6.4-2.AS21.4, ruby-libs 1.6.4-2.AS21.4, ruby-tcltk 1.6.4-2.AS21.4 Red Hat Enterprise Linux AS version 3 irb 1.6.8-9.EL3.8, ruby 1.6.8-9.EL3.8, ruby-libs 1.6.8-9.EL3.8, ruby-mode 1.6.8-9.EL3.8, ruby-tcltk 1.6.8-9.EL3.8 Red Hat Enterprise Linux AS version 4 irb 1.8.1-7.EL4.8, ruby 1.8.1-7.EL4.8, ruby-libs 1.8.1-7.EL4.8, ruby-mode 1.8.1-7.EL4.8, ruby-tcltk 1.8.1-7.EL4.8 Red Hat Enterprise Linux Desktop version 4 irb 1.8.1-7.EL4.8, ruby 1.8.1-7.EL4.8, ruby-libs 1.8.1-7.EL4.8, ruby-mode 1.8.1-7.EL4.8, ruby-tcltk 1.8.1-7.EL4.8 Red Hat Enterprise Linux ES version 2.1 irb 1.6.4-2.AS21.4, ruby 1.6.4-2.AS21.4, ruby-libs 1.6.4-2.AS21.4, ruby-tcltk 1.6.4-2.AS21.4
    +5 more products
    Red Hat Enterprise Linux ES version 3 irb 1.6.8-9.EL3.8, ruby 1.6.8-9.EL3.8, ruby-libs 1.6.8-9.EL3.8, ruby-mode 1.6.8-9.EL3.8, ruby-tcltk 1.6.8-9.EL3.8 Red Hat Enterprise Linux ES version 4 irb 1.8.1-7.EL4.8, ruby 1.8.1-7.EL4.8, ruby-libs 1.8.1-7.EL4.8, ruby-mode 1.8.1-7.EL4.8, ruby-tcltk 1.8.1-7.EL4.8 Red Hat Enterprise Linux WS version 2.1 irb 1.6.4-2.AS21.4, ruby 1.6.4-2.AS21.4, ruby-libs 1.6.4-2.AS21.4, ruby-tcltk 1.6.4-2.AS21.4 Red Hat Enterprise Linux WS version 3 irb 1.6.8-9.EL3.8, ruby 1.6.8-9.EL3.8, ruby-libs 1.6.8-9.EL3.8, ruby-mode 1.6.8-9.EL3.8, ruby-tcltk 1.6.8-9.EL3.8 Red Hat Enterprise Linux WS version 4 irb 1.8.1-7.EL4.8, ruby 1.8.1-7.EL4.8, ruby-libs 1.8.1-7.EL4.8, ruby-mode 1.8.1-7.EL4.8, ruby-tcltk 1.8.1-7.EL4.8
    fixed: vendor fix RHSA-2006:0729

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

Exploit prediction

4.52% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors

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.