Scientific Linux Security Update : ruby on SL7.x x86_64 (20180228)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

include("compat.inc");

if (description)
{
  script_id(107084);
  script_version("3.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/24");

  script_cve_id("CVE-2017-0898", "CVE-2017-0899", "CVE-2017-0900", "CVE-2017-0901", "CVE-2017-0902", "CVE-2017-0903", "CVE-2017-10784", "CVE-2017-14033", "CVE-2017-14064", "CVE-2017-17405", "CVE-2017-17790");

  script_name(english:"Scientific Linux Security Update : ruby on SL7.x x86_64 (20180228)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Scientific Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Security Fix(es) :

  - It was discovered that the Net::FTP module did not
    properly process filenames in combination with certain
    operations. A remote attacker could exploit this flaw to
    execute arbitrary commands by setting up a malicious FTP
    server and tricking a user or Ruby application into
    downloading files with specially crafted names using the
    Net::FTP module. (CVE-2017-17405)

  - A buffer underflow was found in ruby's sprintf function.
    An attacker, with ability to control its format string
    parameter, could send a specially crafted string that
    would disclose heap memory or crash the interpreter.
    (CVE-2017-0898)

  - It was found that rubygems did not sanitize gem names
    during installation of a given gem. A specially crafted
    gem could use this flaw to install files outside of the
    regular directory. (CVE-2017-0901)

  - A vulnerability was found where rubygems did not
    sanitize DNS responses when requesting the hostname of
    the rubygems server for a domain, via a _rubygems._tcp
    DNS SRV query. An attacker with the ability to
    manipulate DNS responses could direct the gem command
    towards a different domain. (CVE-2017-0902)

  - A vulnerability was found where the rubygems module was
    vulnerable to an unsafe YAML deserialization when
    inspecting a gem. Applications inspecting gem files
    without installing them can be tricked to execute
    arbitrary code in the context of the ruby interpreter.
    (CVE-2017-0903)

  - It was found that WEBrick did not sanitize all its log
    messages. If logs were printed in a terminal, an
    attacker could interact with the terminal via the use of
    escape sequences. (CVE-2017-10784)

  - It was found that the decode method of the OpenSSL::ASN1
    module was vulnerable to buffer underrun. An attacker
    could pass a specially crafted string to the application
    in order to crash the ruby interpreter, causing a denial
    of service. (CVE-2017-14033)

  - A vulnerability was found where rubygems did not
    properly sanitize gems' specification text. A specially
    crafted gem could interact with the terminal via the use
    of escape sequences. (CVE-2017-0899)

  - It was found that rubygems could use an excessive amount
    of CPU while parsing a sufficiently long gem summary. A
    specially crafted gem from a gem repository could freeze
    gem commands attempting to parse its summary.
    (CVE-2017-0900)

  - A buffer overflow vulnerability was found in the JSON
    extension of ruby. An attacker with the ability to pass
    a specially crafted JSON input to the extension could
    use this flaw to expose the interpreter's heap memory.
    (CVE-2017-14064)

  - The 'lazy_initialize' function in lib/resolv.rb did not
    properly process certain filenames. A remote attacker
    could possibly exploit this flaw to inject and execute
    arbitrary commands. (CVE-2017-17790)"
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1802&L=scientific-linux-errata&F=&S=&P=9778
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?3b8a648d"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/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:fermilab:scientific_linux:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ruby-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ruby-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ruby-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ruby-irb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ruby-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ruby-tcltk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygem-bigdecimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygem-io-console");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygem-json");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygem-minitest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygem-psych");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygem-rake");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygem-rdoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:rubygems-devel");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/02/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/01");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Scientific Linux Local Security Checks");

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

  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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific Linux " + 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 (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);


flag = 0;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"ruby-2.0.0.648-33.el7_4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"ruby-debuginfo-2.0.0.648-33.el7_4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"ruby-devel-2.0.0.648-33.el7_4")) flag++;
if (rpm_check(release:"SL7", reference:"ruby-doc-2.0.0.648-33.el7_4")) flag++;
if (rpm_check(release:"SL7", reference:"ruby-irb-2.0.0.648-33.el7_4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"ruby-libs-2.0.0.648-33.el7_4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"ruby-tcltk-2.0.0.648-33.el7_4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"rubygem-bigdecimal-1.2.0-33.el7_4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"rubygem-io-console-0.4.2-33.el7_4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"rubygem-json-1.7.7-33.el7_4")) flag++;
if (rpm_check(release:"SL7", reference:"rubygem-minitest-4.3.2-33.el7_4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"rubygem-psych-2.0.0-33.el7_4")) flag++;
if (rpm_check(release:"SL7", reference:"rubygem-rake-0.9.6-33.el7_4")) flag++;
if (rpm_check(release:"SL7", reference:"rubygem-rdoc-4.0.0-33.el7_4")) flag++;
if (rpm_check(release:"SL7", reference:"rubygems-2.0.14.1-33.el7_4")) flag++;
if (rpm_check(release:"SL7", reference:"rubygems-devel-2.0.14.1-33.el7_4")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  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-doc / ruby-irb / etc");
}