CentOS 7 : ghostscript (CESA-2019:2586)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:2586 and 
# CentOS Errata and Security Advisory 2019:2586 respectively.
#

include("compat.inc");

if (description)
{
  script_id(129019);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/07/08");

  script_cve_id("CVE-2019-14811", "CVE-2019-14812", "CVE-2019-14813", "CVE-2019-14817");
  script_xref(name:"RHSA", value:"2019:2586");
  script_xref(name:"IAVB", value:"2019-B-0081-S");

  script_name(english:"CentOS 7 : ghostscript (CESA-2019:2586)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote CentOS host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description",
    value:
"An update for ghostscript is now available for Red Hat Enterprise
Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The Ghostscript suite contains utilities for rendering PostScript and
PDF documents. Ghostscript translates PostScript code to common bitmap
formats so that the code can be displayed or printed.

Security Fix(es) :

* ghostscript: Safer mode bypass by .forceput exposure in
.pdf_hook_DSC_Creator (701445) (CVE-2019-14811)

* ghostscript: Safer mode bypass by .forceput exposure in
setuserparams (701444) (CVE-2019-14812)

* ghostscript: Safer mode bypass by .forceput exposure in
setsystemparams (701443) (CVE-2019-14813)

* ghostscript: Safer mode bypass by .forceput exposure in
.pdfexectoken and other procedures (701450) (CVE-2019-14817)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section."
  );
  # https://lists.centos.org/pipermail/centos-announce/2019-September/023413.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?9e4215b5"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected ghostscript packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-14813");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ghostscript");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ghostscript-cups");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ghostscript-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ghostscript-gtk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libgs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libgs-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/09/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/09/19");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/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/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 7.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/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, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"ghostscript-9.25-2.el7_7.2")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"ghostscript-cups-9.25-2.el7_7.2")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"ghostscript-doc-9.25-2.el7_7.2")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"ghostscript-gtk-9.25-2.el7_7.2")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"libgs-9.25-2.el7_7.2")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"libgs-devel-9.25-2.el7_7.2")) 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, "ghostscript / ghostscript-cups / ghostscript-doc / ghostscript-gtk / etc");
}