Debian DSA-2802-1 : nginx - restriction bypass

#%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-2802. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(71055);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2013-4547");
  script_bugtraq_id(63814);
  script_xref(name:"DSA", value:"2802");

  script_name(english:"Debian DSA-2802-1 : nginx - restriction bypass");
  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:
"Ivan Fratric of the Google Security Team discovered a bug in nginx, a
web server, which might allow an attacker to bypass security
restrictions by using a specially crafted request.

The oldstable distribution (squeeze) is not affected by this problem."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=730012"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/nginx"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2013/dsa-2802"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the nginx packages.

For the stable distribution (wheezy), this problem has been fixed in
version 1.2.1-2.2+wheezy2."
  );
  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:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nginx");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/11/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/11/25");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2021 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:"7.0", prefix:"nginx", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-common", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-doc", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-extras", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-extras-dbg", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-full", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-full-dbg", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-light", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-light-dbg", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-naxsi", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-naxsi-dbg", reference:"1.2.1-2.2+wheezy2")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-naxsi-ui", reference:"1.2.1-2.2+wheezy2")) 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");