Debian DSA-2248-1 : ejabberd - denial of service

#%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-2248. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(55036);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");

  script_cve_id("CVE-2011-1753");
  script_xref(name:"DSA", value:"2248");

  script_name(english:"Debian DSA-2248-1 : ejabberd - denial of service");
  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:
"Wouter Coekaerts discovered that ejabberd, a distributed XMPP/Jabber
server written in Erlang, is vulnerable to the so-called 'billion
laughs' attack because it does not prevent entity expansion on
received data. This allows an attacker to perform denial of service
attacks against the service by sending specially crafted XML data to
it."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/squeeze/ejabberd"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2011/dsa-2248"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the ejabberd packages.

For the oldstable distribution (lenny), this problem has been fixed in
version 2.0.1-6+lenny3.

For the stable distribution (squeeze), this problem has been fixed in
version 2.1.5-3+squeeze1."
  );
  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:debian:debian_linux:ejabberd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:5.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/03/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/06/10");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2021 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:"5.0", prefix:"ejabberd", reference:"2.0.1-6+lenny3")) flag++;
if (deb_check(release:"6.0", prefix:"ejabberd", reference:"2.1.5-3+squeeze1")) 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");