httputils.rb in WEBrick in Ruby 1.8.1 and 1.8.5, as used in Red Hat Enterprise Linux 4 and 5, allows remote attackers to cause a denial of service (CPU consumption) via a crafted HTTP request. NOTE: this issue exists because of an incomplete fix for CVE-2008-3656.

References

• https://nvd.nist.gov/vuln/detail/CVE-2008-4310
• https://bugzilla.redhat.com/show_bug.cgi?id=470252
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10250
• http://www.openwall.com/lists/oss-security/2008/12/04/2
• http://www.redhat.com/support/errata/RHSA-2008-0981.html
• ruby/webrick@b2ccd5f
• https://web.archive.org/web/20111230125610/http://secunia.com/advisories/33013
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/webrick/CVE-2008-4310.yml