CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
83.7%
Multiple vulnerabilities have been discovered in pdns, an authoritative DNS server. The Common Vulnerabilities and Exposures project identifies the following problems :
CVE-2016-2120 Mathieu Lafon discovered that pdns does not properly validate records in zones. An authorized user can take advantage of this flaw to crash server by inserting a specially crafted record in a zone under their control and then sending a DNS query for that record.
CVE-2016-7068 Florian Heinz and Martin Kluge reported that pdns parses all records present in a query regardless of whether they are needed or even legitimate, allowing a remote, unauthenticated attacker to cause an abnormal CPU usage load on the pdns server, resulting in a partial denial of service if the system becomes overloaded.
CVE-2016-7072 Mongo discovered that the webserver in pdns is susceptible to a denial-of-service vulnerability, allowing a remote, unauthenticated attacker to cause a denial of service by opening a large number of TCP connections to the web server.
CVE-2016-7073 / CVE-2016-7074 Mongo discovered that pdns does not sufficiently validate TSIG signatures, allowing an attacker in position of man-in-the-middle to alter the content of an AXFR.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-3764. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(96497);
script_version("3.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2016-2120", "CVE-2016-7068", "CVE-2016-7072", "CVE-2016-7073", "CVE-2016-7074");
script_xref(name:"DSA", value:"3764");
script_name(english:"Debian DSA-3764-1 : pdns - security update");
script_summary(english:"Checks dpkg output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security-related 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-2016-2120
Mathieu Lafon discovered that pdns does not properly
validate records in zones. An authorized user can take
advantage of this flaw to crash server by inserting a
specially crafted record in a zone under their control
and then sending a DNS query for that record.
- CVE-2016-7068
Florian Heinz and Martin Kluge reported that pdns parses
all records present in a query regardless of whether
they are needed or even legitimate, allowing a remote,
unauthenticated attacker to cause an abnormal CPU usage
load on the pdns server, resulting in a partial denial
of service if the system becomes overloaded.
- CVE-2016-7072
Mongo discovered that the webserver in pdns is
susceptible to a denial-of-service vulnerability,
allowing a remote, unauthenticated attacker to cause a
denial of service by opening a large number of TCP
connections to the web server.
- CVE-2016-7073 / CVE-2016-7074
Mongo discovered that pdns does not sufficiently
validate TSIG signatures, allowing an attacker in
position of man-in-the-middle to alter the content of an
AXFR."
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-2120"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-7068"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-7072"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-7073"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-7074"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/jessie/pdns"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2017/dsa-3764"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the pdns packages.
For the stable distribution (jessie), these problems have been fixed
in version 3.4.1-4+deb8u7."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_set_attribute(attribute:"patch_publication_date", value:"2017/01/13");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/01/16");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2021 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:"pdns-backend-geo", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-ldap", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-lmdb", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-lua", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-mydns", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-mysql", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-pgsql", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-pipe", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-remote", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-backend-sqlite3", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-server", reference:"3.4.1-4+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"pdns-server-dbg", reference:"3.4.1-4+deb8u7")) 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");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2120
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7068
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7072
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7073
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7074
packages.debian.org/source/jessie/pdns
security-tracker.debian.org/tracker/CVE-2016-2120
security-tracker.debian.org/tracker/CVE-2016-7068
security-tracker.debian.org/tracker/CVE-2016-7072
security-tracker.debian.org/tracker/CVE-2016-7073
security-tracker.debian.org/tracker/CVE-2016-7074
www.debian.org/security/2017/dsa-3764
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
83.7%