Fedora 17 : ruby-1.9.3.327-19.fc17 (2012-18017)

2012-11-19T00:00:00
ID FEDORA_2012-18017.NASL
Type nessus
Reporter Tenable
Modified 2015-10-20T00:00:00

Description

A security flaw was found on ruby currently shiped on Fedora 18 that carefully crafted sequence of strings may cause a denial of service attack on the service that parses the sequence to create a Hash object by using the strings as keys. This issue is now registered as CVE-2012-5371.

This new package should fix this issue.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory 2012-18017.
#

include("compat.inc");

if (description)
{
  script_id(62955);
  script_version("$Revision: 1.8 $");
  script_cvs_date("$Date: 2015/10/20 22:34:53 $");

  script_cve_id("CVE-2012-5371");
  script_bugtraq_id(56484);
  script_xref(name:"FEDORA", value:"2012-18017");

  script_name(english:"Fedora 17 : ruby-1.9.3.327-19.fc17 (2012-18017)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A security flaw was found on ruby currently shiped on Fedora 18 that
carefully crafted sequence of strings may cause a denial of service
attack on the service that parses the sequence to create a Hash object
by using the strings as keys. This issue is now registered as
CVE-2012-5371.

This new package should fix this issue.

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=875267"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2012-November/092515.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?c3e0fcff"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected ruby package.");
  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:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:ruby");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:17");

  script_set_attribute(attribute:"patch_publication_date", value:"2012/11/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/11/19");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2012-2015 Tenable Network Security, Inc.");
  script_family(english:"Fedora Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.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) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^17([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 17.x", "Fedora " + 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);

flag = 0;
if (rpm_check(release:"FC17", reference:"ruby-1.9.3.327-19.fc17")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ruby");
}