RHEL 2.1 / 3 / 4 : ruby (RHSA-2006:0729)

2006-11-20T00:00:00
ID REDHAT-RHSA-2006-0729.NASL
Type nessus
Reporter Tenable
Modified 2016-12-29T00:00:00

Description

Updated ruby packages that fix a denial of service issue for the CGI instance are now available.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Ruby is an interpreted scripting language for object-oriented programming.

A flaw was discovered in the way Ruby's CGI module handles certain multipart/form-data MIME data. If a remote attacker sends a specially crafted multipart-form-data request, it is possible to cause the ruby CGI script to enter an infinite loop, causing a denial of service. (CVE-2006-5467)

Users of Ruby should upgrade to these updated packages which contain backported patches and are not vulnerable to these issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2006:0729. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(23679);
  script_version ("$Revision: 1.17 $");
  script_cvs_date("$Date: 2016/12/29 15:35:20 $");

  script_cve_id("CVE-2006-5467");
  script_bugtraq_id(20777);
  script_osvdb_id(11534, 34237);
  script_xref(name:"RHSA", value:"2006:0729");

  script_name(english:"RHEL 2.1 / 3 / 4 : ruby (RHSA-2006:0729)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated ruby packages that fix a denial of service issue for the CGI
instance are now available.

This update has been rated as having moderate security impact by the
Red Hat Security Response Team.

Ruby is an interpreted scripting language for object-oriented
programming.

A flaw was discovered in the way Ruby's CGI module handles certain
multipart/form-data MIME data. If a remote attacker sends a specially
crafted multipart-form-data request, it is possible to cause the ruby
CGI script to enter an infinite loop, causing a denial of service.
(CVE-2006-5467)

Users of Ruby should upgrade to these updated packages which contain
backported patches and are not vulnerable to these issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.redhat.com/security/data/cve/CVE-2006-5467.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://rhn.redhat.com/errata/RHSA-2006-0729.html"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:irb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-mode");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-tcltk");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:2.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");

  script_set_attribute(attribute:"patch_publication_date", value:"2006/11/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/11/20");
  script_set_attribute(attribute:"vuln_publication_date", value:"2004/11/08");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2016 Tenable Network Security, Inc.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = eregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! ereg(pattern:"^(2\.1|3|4)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 2.1 / 3.x / 4.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2006:0729";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"irb-1.6.4-2.AS21.4")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-1.6.4-2.AS21.4")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-devel-1.6.4-2.AS21.4")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-docs-1.6.4-2.AS21.4")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-libs-1.6.4-2.AS21.4")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"ruby-tcltk-1.6.4-2.AS21.4")) flag++;

  if (rpm_check(release:"RHEL3", reference:"irb-1.6.8-9.EL3.8")) flag++;
  if (rpm_check(release:"RHEL3", reference:"ruby-1.6.8-9.EL3.8")) flag++;
  if (rpm_check(release:"RHEL3", reference:"ruby-devel-1.6.8-9.EL3.8")) flag++;
  if (rpm_check(release:"RHEL3", reference:"ruby-docs-1.6.8-9.EL3.8")) flag++;
  if (rpm_check(release:"RHEL3", reference:"ruby-libs-1.6.8-9.EL3.8")) flag++;
  if (rpm_check(release:"RHEL3", reference:"ruby-mode-1.6.8-9.EL3.8")) flag++;
  if (rpm_check(release:"RHEL3", reference:"ruby-tcltk-1.6.8-9.EL3.8")) flag++;

  if (rpm_check(release:"RHEL4", reference:"irb-1.8.1-7.EL4.8")) flag++;
  if (rpm_check(release:"RHEL4", reference:"ruby-1.8.1-7.EL4.8")) flag++;
  if (rpm_check(release:"RHEL4", reference:"ruby-devel-1.8.1-7.EL4.8")) flag++;
  if (rpm_check(release:"RHEL4", reference:"ruby-docs-1.8.1-7.EL4.8")) flag++;
  if (rpm_check(release:"RHEL4", reference:"ruby-libs-1.8.1-7.EL4.8")) flag++;
  if (rpm_check(release:"RHEL4", reference:"ruby-mode-1.8.1-7.EL4.8")) flag++;
  if (rpm_check(release:"RHEL4", reference:"ruby-tcltk-1.8.1-7.EL4.8")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "irb / ruby / ruby-devel / ruby-docs / ruby-libs / ruby-mode / etc");
  }
}