RHEL 5 : ruby (RHSA-2013:0611)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2013:0611. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(65084);
  script_version("1.17");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2013-1821");
  script_bugtraq_id(58141);
  script_xref(name:"RHSA", value:"2013:0611");

  script_name(english:"RHEL 5 : ruby (RHSA-2013:0611)");
  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 one security issue are now available
for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having
moderate security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from
the CVE link in the References section.

Ruby is an extensible, interpreted, object-oriented, scripting
language. It has features to process text files and to do system
management tasks.

It was discovered that Ruby's REXML library did not properly restrict
XML entity expansion. An attacker could use this flaw to cause a
denial of service by tricking a Ruby application using REXML to read
text nodes from specially crafted XML content, which will result in
REXML consuming large amounts of system memory. (CVE-2013-1821)

All users of Ruby are advised to upgrade to these updated packages,
which contain backported patches to resolve this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2013:0611"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2013-1821"
  );
  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:U/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:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-debuginfo");
  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-irb");
  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-rdoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-ri");
  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:5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5.9");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/03/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/03/08");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  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:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 5.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-2013:0611";
  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:"RHEL5", cpu:"i386", reference:"ruby-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", reference:"ruby-debuginfo-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", reference:"ruby-devel-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-docs-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-docs-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-docs-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-irb-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-irb-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-irb-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", reference:"ruby-libs-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-mode-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-mode-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-mode-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-rdoc-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-rdoc-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-rdoc-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-ri-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-ri-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-ri-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ruby-tcltk-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ruby-tcltk-1.8.5-29.el5_9")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ruby-tcltk-1.8.5-29.el5_9")) 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, "ruby / ruby-debuginfo / ruby-devel / ruby-docs / ruby-irb / etc");
  }
}