Debian DSA-295-1 : pptpd - buffer overflow

2004-09-29T00:00:00
ID DEBIAN_DSA-295.NASL
Type nessus
Reporter This script is Copyright (C) 2004-2019 Tenable Network Security, Inc.
Modified 2020-04-02T00:00:00

Description

Timo Sirainen discovered a vulnerability in pptpd, a Point to Point Tunneling Server, which implements PPTP-over-IPSEC and is commonly used to create Virtual Private Networks (VPN). By specifying a small packet length an attacker is able to overflow a buffer and execute code under the user id that runs pptpd, probably root. An exploit for this problem is already circulating.

                                        
                                            #%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-295. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(15132);
  script_version("1.21");
  script_cvs_date("Date: 2019/08/02 13:32:17");

  script_cve_id("CVE-2003-0213");
  script_bugtraq_id(7316);
  script_xref(name:"DSA", value:"295");

  script_name(english:"Debian DSA-295-1 : pptpd - 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:
"Timo Sirainen discovered a vulnerability in pptpd, a Point to Point
Tunneling Server, which implements PPTP-over-IPSEC and is commonly
used to create Virtual Private Networks (VPN). By specifying a small
packet length an attacker is able to overflow a buffer and execute
code under the user id that runs pptpd, probably root. An exploit for
this problem is already circulating."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.debian.org/security/2003/dsa-295"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the pptpd package immediately.

For the stable distribution (woody) this problem has been fixed in
version 1.1.2-1.4.

For the old stable distribution (potato) this problem has been fixed
in version 1.0.0-4.2."
  );
  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:F/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:"metasploit_name", value:'Poptop Negative Read Overflow');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pptpd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:2.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:3.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2003/04/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2004/09/29");
  script_set_attribute(attribute:"vuln_publication_date", value:"2003/04/09");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2004-2019 Tenable Network Security, Inc.");
  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:"2.2", prefix:"pptpd", reference:"1.0.0-4.2")) flag++;
if (deb_check(release:"3.0", prefix:"pptpd", reference:"1.1.2-1.4")) 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");