Debian DLA-627-1 : pdns 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-627-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(93567);
  script_version("2.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2016-5426", "CVE-2016-5427", "CVE-2016-6172");

  script_name(english:"Debian DLA-627-1 : pdns 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:
"Multiple vulnerabilities have been discovered in pdns, an
authoritative DNS server. The Common Vulnerabilities and Exposures
project identifies the following problems :

CVE-2016-5426 / CVE-2016-5427

Florian Heinz and Martin Kluge reported that the PowerDNS
Authoritative Server accepts queries with a qname's length larger than
255 bytes and does not properly handle dot inside labels. A remote,
unauthenticated attacker can take advantage of these flaws to cause
abnormal load on the PowerDNS backend by sending specially crafted DNS
queries, potentially leading to a denial of service.

CVE-2016-6172

It was reported that a malicious primary DNS server can crash a
secondary PowerDNS server due to improper restriction of zone size
limits. This update adds a feature to limit AXFR sizes in response to
this flaw.

For Debian 7 'Wheezy', these problems have been fixed in version
3.1-4.1+deb7u2.

We recommend that you upgrade your pdns 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/2016/09/msg00020.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/pdns"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C");
  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:N/A:H");
  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:pdns-backend-geo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-backend-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-backend-lua");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-backend-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-backend-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-backend-pipe");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-backend-sqlite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-backend-sqlite3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pdns-server-dbg");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/09/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/09/19");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 Tenable Network Security, Inc.");
  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:"pdns-backend-geo", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-backend-ldap", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-backend-lua", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-backend-mysql", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-backend-pgsql", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-backend-pipe", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-backend-sqlite", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-backend-sqlite3", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-server", reference:"3.1-4.1+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"pdns-server-dbg", reference:"3.1-4.1+deb7u2")) flag++;

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