Debian DLA-1264-1 : unbound 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-1264-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(106508);
  script_version("3.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2017-15105");

  script_name(english:"Debian DLA-1264-1 : unbound 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:
"Ralph Dolmans and Karst Koymans found a flaw in the way unbound
validated wildcard-synthesized NSEC records. An improperly validated
wildcard NSEC record could be used to prove the non-existence
(NXDOMAIN answer) of an existing wildcard record, or trick unbound
into accepting a NODATA proof.

For more information please refer to the upstream advisory at
https://unbound.net/downloads/CVE-2017-15105.txt.

For Debian 7 'Wheezy', these problems have been fixed in version
1.4.17-3+deb7u3.

We recommend that you upgrade your unbound 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/2018/01/msg00039.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/unbound"
  );
  # https://unbound.net/downloads/CVE-2017-15105.txt
  script_set_attribute(
    attribute:"see_also",
    value:"https://nlnetlabs.nl/downloads/unbound/CVE-2017-15105.txt"
  );
  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:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libunbound-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libunbound2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-unbound");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:unbound");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:unbound-anchor");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:unbound-host");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/01/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/31");
  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:"7.0", prefix:"libunbound-dev", reference:"1.4.17-3+deb7u3")) flag++;
if (deb_check(release:"7.0", prefix:"libunbound2", reference:"1.4.17-3+deb7u3")) flag++;
if (deb_check(release:"7.0", prefix:"python-unbound", reference:"1.4.17-3+deb7u3")) flag++;
if (deb_check(release:"7.0", prefix:"unbound", reference:"1.4.17-3+deb7u3")) flag++;
if (deb_check(release:"7.0", prefix:"unbound-anchor", reference:"1.4.17-3+deb7u3")) flag++;
if (deb_check(release:"7.0", prefix:"unbound-host", reference:"1.4.17-3+deb7u3")) 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");