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This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.DEBIAN_DSA-4844.NASL
HistoryFeb 05, 2021 - 12:00 a.m.

Debian DSA-4844-1 : dnsmasq - security update

2021-02-0500:00:00
This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
24

7.5 High

AI Score

Confidence

High

Moshe Kol and Shlomi Oberman of JSOF discovered several vulnerabilities in dnsmasq, a small caching DNS proxy and DHCP/TFTP server. They could result in denial of service, cache poisoning or the execution of arbitrary code.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4844. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(146242);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/23");

  script_cve_id(
    "CVE-2020-25681",
    "CVE-2020-25682",
    "CVE-2020-25683",
    "CVE-2020-25684",
    "CVE-2020-25685",
    "CVE-2020-25686",
    "CVE-2020-25687"
  );
  script_xref(name:"DSA", value:"4844");
  script_xref(name:"CEA-ID", value:"CEA-2021-0003");

  script_name(english:"Debian DSA-4844-1 : dnsmasq - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"Moshe Kol and Shlomi Oberman of JSOF discovered several
vulnerabilities in dnsmasq, a small caching DNS proxy and DHCP/TFTP
server. They could result in denial of service, cache poisoning or the
execution of arbitrary code.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/dnsmasq");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/dnsmasq");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-4844");
  script_set_attribute(attribute:"solution", value:
"Upgrade the dnsmasq packages.

For the stable distribution (buster), these problems have been fixed
in version 2.80-1+deb10u1.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/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:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25682");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/01/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dnsmasq");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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:"10.0", prefix:"dnsmasq", reference:"2.80-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"dnsmasq-base", reference:"2.80-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"dnsmasq-base-lua", reference:"2.80-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"dnsmasq-utils", reference:"2.80-1+deb10u1")) 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");
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7.5 High

AI Score

Confidence

High

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