Debian DSA-2721-1 : nginx - buffer overflow

#%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-2721. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(67202);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2013-2070");
  script_bugtraq_id(59824);
  script_xref(name:"DSA", value:"2721");

  script_name(english:"Debian DSA-2721-1 : nginx - buffer overflow");
  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:
"A buffer overflow has been identified in nginx, a small, powerful,
scalable web/proxy server, when processing certain chunked transfer
encoding requests if proxy_pass to untrusted upstream HTTP servers is
used. An attacker may use this flaw to perform denial of service
attacks, disclose worker process memory, or possibly execute arbitrary
code.

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=708164"
  );
  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-2721"
  );
  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+wheezy1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/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:nginx");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/07/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/08");
  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+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-common", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-doc", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-extras", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-extras-dbg", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-full", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-full-dbg", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-light", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-light-dbg", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-naxsi", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-naxsi-dbg", reference:"1.2.1-2.2+wheezy1")) flag++;
if (deb_check(release:"7.0", prefix:"nginx-naxsi-ui", reference:"1.2.1-2.2+wheezy1")) 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");