Debian DLA-1552-1 : ghostscript security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1552-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(118313);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2018-17961", "CVE-2018-18073", "CVE-2018-18284");
  script_xref(name:"IAVB", value:"2019-B-0081-S");

  script_name(english:"Debian DLA-1552-1 : ghostscript security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This is a follow-up update for the recently discovered -dSAFER issues
reported by Tavis Ormandy.

Tavis Ormandy discovered multiple vulnerabilites in Ghostscript, an
interpreter for the PostScript language, which could result in denial
of service, the creation of files or the execution of arbitrary code
if a malformed Postscript file is processed (despite the dSAFER
sandbox being enabled).

For Debian 8 'Jessie', these problems have been fixed in version
9.06~dfsg-2+deb8u11.

We recommend that you upgrade your ghostscript packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2018/10/msg00013.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/jessie/ghostscript");
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/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:debian:debian_linux:ghostscript");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ghostscript-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ghostscript-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ghostscript-x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgs9-common");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/10/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/23");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"ghostscript", reference:"9.06~dfsg-2+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"ghostscript-dbg", reference:"9.06~dfsg-2+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"ghostscript-doc", reference:"9.06~dfsg-2+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"ghostscript-x", reference:"9.06~dfsg-2+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"libgs-dev", reference:"9.06~dfsg-2+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"libgs9", reference:"9.06~dfsg-2+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"libgs9-common", reference:"9.06~dfsg-2+deb8u11")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");