Debian DLA-1528-1 : strongswan 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-1528-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(117889);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2018-17540");

  script_name(english:"Debian DLA-1528-1 : strongswan 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:
"It was discovered that there was a denial of service vulnerability in
strongswan, a virtual private network (VPN) client and server.

Verification of an RSA signature with a very short public key caused
an integer underflow in a length check that resulted in a heap buffer
overflow.

For Debian 8 'Jessie', this issue has been fixed in strongswan version
5.2.1-6+deb8u8.

We recommend that you upgrade your strongswan 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/msg00001.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/strongswan"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:charon-cmd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libcharon-extra-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libstrongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libstrongswan-extra-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libstrongswan-standard-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-charon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-ike");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-ikev1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-ikev2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-libcharon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-nm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-starter");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/03");
  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:"charon-cmd", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"libcharon-extra-plugins", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"libstrongswan", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"libstrongswan-extra-plugins", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"libstrongswan-standard-plugins", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan-charon", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan-dbg", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan-ike", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan-ikev1", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan-ikev2", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan-libcharon", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan-nm", reference:"5.2.1-6+deb8u8")) flag++;
if (deb_check(release:"8.0", prefix:"strongswan-starter", reference:"5.2.1-6+deb8u8")) 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");