Vulnerabilities > CVE-2005-0876 - Remote vulnerability in Dnsmasq

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
 script_id(17631);
 script_version("1.23");
 script_cvs_date("Date: 2018/11/15 20:50:21");
 script_cve_id("CVE-2005-0876", "CVE-2005-0877");
 script_bugtraq_id(12897);

 script_name(english:"dnsmasq < 2.21.0 Multiple Remote Vulnerabilities");
 script_summary(english:"Checks the version of dnsmasq");

 script_set_attribute(attribute:"synopsis", value:"The remote DNS / DHCP service is affected by multiple vulnerabilities.");
 script_set_attribute(attribute:"description", value:
"The remote host is running dnsmasq, a DHCP and DNS server.

The version of dnsmasq installed on the remote host contains an
off-by-one boundary error when reading a DHCP lease file. An attacker
can leverage this issue to cause the application to crash or possible
execute arbitrary code the next time it is restarted by sending a long
hostname and client-id when requesting a DHCP lease.

In addition, the application only checks the 16-bit ID against current
queries when receiving DNS replies. An attacker may be able to send a
flood of DNS replies and poison the DNS cache.");
 script_set_attribute(attribute:"see_also", value:"https://secuniaresearch.flexerasoftware.com/advisories/14691");
 script_set_attribute(attribute:"see_also", value:"http://www.thekelleys.org.uk/dnsmasq/CHANGELOG");
 script_set_attribute(attribute:"solution", value:"Upgrade to dnsmasq 2.21.0 or later.");
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
 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:L/I:L/A:L");
 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:"vuln_publication_date", value:"2005/03/23");
 script_set_attribute(attribute:"plugin_publication_date", value:"2005/03/25");

 script_set_attribute(attribute:"potential_vulnerability", value:"true");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_set_attribute(attribute:"cpe", value:"cpe:/a:thekelleys:dnsmasq");
 script_end_attributes();

 script_category(ACT_GATHER_INFO);
 script_copyright(english:"This script is Copyright (C) 2005-2018 Tenable Network Security, Inc.");
 script_family(english:"DNS");

  script_dependencie("dns_version.nasl");
  script_require_keys("dns_server/version", "Settings/ParanoidReport");
  script_require_ports("Services/dns", 53);
 
  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");

app_name = "dnsmasq";

port = get_kb_item("Services/udp/dns");
if (!port) port = 53;

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# dnsmasq replies to BIND.VERSION
version = get_kb_item_or_exit("dns_server/version");
version = tolower(version);
display_version = version;

if (version !~ "dnsmasq-(v)?")
  audit(AUDIT_NOT_LISTEN, app_name, port);

version = ereg_replace(pattern:"^dnsmasq-(v)?(.*)$", replace:"\2", string:version);

if (version == '2')
  audit(AUDIT_VER_NOT_GRANULAR, app_name, port, display_version);

if (version =~ "^([01]\.|2\.([0-9]$|1[0-9]$|20))")
{
  report = '\n' +
    '\n  Installed version : ' + display_version +
    '\n  Fixed version     : dnsmasq-2.21' +
    '\n';
  security_report_v4(port:53, proto:"udp", severity:SECURITY_HOLE, extra:report);
}
else audit(AUDIT_LISTEN_NOT_VULN, app_name, port, display_version, 'udp');

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Slackware Security Advisory 2005-201-01. The text 
# itself is copyright (C) Slackware Linux, Inc.
#

include("compat.inc");

if (description)
{
  script_id(19850);
  script_version("1.15");
  script_cvs_date("Date: 2019/10/25 13:36:20");

  script_cve_id("CVE-2005-0876", "CVE-2005-0877");
  script_xref(name:"SSA", value:"2005-201-01");

  script_name(english:"Slackware 10.0 / 10.1 / current : dnsmasq (SSA:2005-201-01)");
  script_summary(english:"Checks for updated package in /var/log/packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Slackware host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"New dnsmasq packages are available for Slackware 10.0, 10.1, and
-current to fix security issues. An off-by-one overflow vulnerability
may allow a DHCP client to create a denial of service condition.
Additional code was also added to detect and defeat attempts to poison
the DNS cache."
  );
  # http://www.slackware.com/security/viewer.php?l=slackware-security&y=2005&m=slackware-security.383134
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?155556d9"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected dnsmasq package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:slackware:slackware_linux:dnsmasq");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:10.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:10.1");

  script_set_attribute(attribute:"patch_publication_date", value:"2005/07/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/10/05");
  script_set_attribute(attribute:"vuln_publication_date", value:"2005/03/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2019 Tenable Network Security, Inc.");
  script_family(english:"Slackware Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Slackware/release", "Host/Slackware/packages");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("slackware.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Slackware/release")) audit(AUDIT_OS_NOT, "Slackware");
if (!get_kb_item("Host/Slackware/packages")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Slackware", cpu);


flag = 0;
if (slackware_check(osver:"10.0", pkgname:"dnsmasq", pkgver:"2.22", pkgarch:"i486", pkgnum:"1")) flag++;

if (slackware_check(osver:"10.1", pkgname:"dnsmasq", pkgver:"2.22", pkgarch:"i486", pkgnum:"1")) flag++;

if (slackware_check(osver:"current", pkgname:"dnsmasq", pkgver:"2.22", pkgarch:"i486", pkgnum:"1")) flag++;


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