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Fencer Vulns
medium 5.0

CVE-2006-6303 json

The read_multipart function in cgi.rb in Ruby before 1.8.5-p2 does not properly detect boundaries in MIME multipart content, which allows r…

published 2006-12-06 19 y ago modified 2026-06-16 4 mo ago also EUVD-2006-6286

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.0%
EPSS 4.0% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

The read_multipart function in cgi.rb in Ruby before 1.8.5-p2 does not properly detect boundaries in MIME multipart content, which allows remote attackers to cause a denial of service (infinite loop) via crafted HTTP requests, a different issue than CVE-2006-5467.

Patch / fix

  • ruby RHEL 2.1 1.6.4-6.el2
  • ruby RHEL 3 1.6.8-12.el3
  • irb RHEL 2.1 1.6.4-6.el2
  • irb RHEL 3 1.6.8-12.el3
  • ruby-libs RHEL 2.1 1.6.4-6.el2
  • ruby-libs RHEL 3 1.6.8-12.el3
  • ruby-mode RHEL 3 1.6.8-12.el3
  • ruby-tcltk RHEL 2.1 1.6.4-6.el2

red hat advisories RHSA-2008:0562RHSA-2007:0961

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-2006-6303 updated

ruby's cgi.rb vulnerable infinite loop DoS

  • Red Hat Desktop version 3 irb 1.6.8-12.el3, ruby 1.6.8-12.el3, ruby-libs 1.6.8-12.el3, ruby-mode 1.6.8-12.el3, ruby-tcltk 1.6.8-12.el3 Red Hat Enterprise Linux AS (Advanced Server) version 2.1 irb 1.6.4-6.el2, ruby 1.6.4-6.el2, ruby-libs 1.6.4-6.el2, ruby-tcltk 1.6.4-6.el2 Red Hat Enterprise Linux AS version 3 irb 1.6.8-12.el3, ruby 1.6.8-12.el3, ruby-libs 1.6.8-12.el3, ruby-mode 1.6.8-12.el3, ruby-tcltk 1.6.8-12.el3
    fixed: vendor fix RHSA-2008:0562
  • Red Hat Enterprise Linux AS version 4 irb 1.8.1-7.EL4.8.1, ruby 1.8.1-7.EL4.8.1, ruby-libs 1.8.1-7.EL4.8.1, ruby-mode 1.8.1-7.EL4.8.1, ruby-tcltk 1.8.1-7.EL4.8.1 Red Hat Enterprise Linux Desktop version 4 irb 1.8.1-7.EL4.8.1, ruby 1.8.1-7.EL4.8.1, ruby-libs 1.8.1-7.EL4.8.1, ruby-mode 1.8.1-7.EL4.8.1, ruby-tcltk 1.8.1-7.EL4.8.1
    fixed: vendor fix RHSA-2007:0961
  • Red Hat Enterprise Linux ES version 2.1 irb 1.6.4-6.el2, ruby 1.6.4-6.el2, ruby-libs 1.6.4-6.el2, ruby-tcltk 1.6.4-6.el2 Red Hat Enterprise Linux ES version 3 irb 1.6.8-12.el3, ruby 1.6.8-12.el3, ruby-libs 1.6.8-12.el3, ruby-mode 1.6.8-12.el3, ruby-tcltk 1.6.8-12.el3
    fixed: vendor fix RHSA-2008:0562
  • Red Hat Enterprise Linux ES version 4 irb 1.8.1-7.EL4.8.1, ruby 1.8.1-7.EL4.8.1, ruby-libs 1.8.1-7.EL4.8.1, ruby-mode 1.8.1-7.EL4.8.1, ruby-tcltk 1.8.1-7.EL4.8.1
    fixed: vendor fix RHSA-2007:0961
  • Red Hat Enterprise Linux WS version 2.1 irb 1.6.4-6.el2, ruby 1.6.4-6.el2, ruby-libs 1.6.4-6.el2, ruby-tcltk 1.6.4-6.el2 Red Hat Enterprise Linux WS version 3 irb 1.6.8-12.el3, ruby 1.6.8-12.el3, ruby-libs 1.6.8-12.el3, ruby-mode 1.6.8-12.el3, ruby-tcltk 1.6.8-12.el3
    fixed: vendor fix RHSA-2008:0562
  • Red Hat Enterprise Linux WS version 4 irb 1.8.1-7.EL4.8.1, ruby 1.8.1-7.EL4.8.1, ruby-libs 1.8.1-7.EL4.8.1, ruby-mode 1.8.1-7.EL4.8.1, ruby-tcltk 1.8.1-7.EL4.8.1
    fixed: vendor fix RHSA-2007:0961

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

4.04% chance of exploitation in the next 30 days, higher than 90% 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.