Vulnerabilities > CVE-2015-1031 - Use After Free Remote Code Execution vulnerability in Privoxy

#%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-3133. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(80871);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2015-1031");
  script_bugtraq_id(71993);
  script_xref(name:"DSA", value:"3133");

  script_name(english:"Debian DSA-3133-1 : privoxy - security update");
  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:
"Multiple use-after-frees were discovered in Privoxy, a
privacy-enhancing HTTP proxy."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/privoxy"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2015/dsa-3133"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the privoxy packages.

For the stable distribution (wheezy), this problem has been fixed in
version 3.0.19-2+deb7u1.

For the upcoming stable distribution (jessie), this problem will be
fixed soon."
  );
  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: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:privoxy");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/01/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/01/21");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2020 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:"privoxy", reference:"3.0.19-2+deb7u1")) 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");

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

include("compat.inc");

if (description)
{
  script_id(81086);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/25");

  script_cve_id("CVE-2015-1030", "CVE-2015-1031");
  script_bugtraq_id(71991, 71993);

  script_name(english:"Privoxy < 3.0.22 Multiple Vulnerabilities");
  script_summary(english:"Checks the version of Privoxy.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web proxy is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-identified version number, the Privoxy installed
on the remote host is a version prior to 3.0.22. It is, therefore,
affected by multiple vulnerabilities:

  - A denial of service vulnerability exists due to a
    memory leak when client connections are rejected when
    the socket limit has been reached. Note that this issue
    only affects version 3.0.21 with IPv6 support, which is
    enabled by default. (CVE-2015-1030)

  - Multiple unspecified use-after-free vulnerabilities
    exist that could lead to arbitrary code execution.
    (CVE-2015-1031)

Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"https://sourceforge.net/p/ijbswa/mailman/message/33089172/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to version 3.0.22 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_attribute(attribute:"cvss_score_source", value:"CVE-2015-1031");

  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:"2014/11/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/11/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/01/29");

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

  script_category(ACT_GATHER_INFO);
  script_family(english:"Firewalls");

  script_copyright(english:"This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("privoxy_detect.nasl");
  script_require_keys("www/Privoxy", "Settings/ParanoidReport");
  script_require_ports("Services/www", 8118);

  exit(0);
}

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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

port = get_http_port(default:8118);
app_name = "Privoxy";

install = get_install_from_kb(
  appname      : app_name,
  port         : port,
  exit_on_fail : TRUE
);

version = install["ver"];
if (version == UNKNOWN_VER) audit(AUDIT_UNKNOWN_WEB_SERVER_VER, app_name, port);

install_url = build_url(qs:install["dir"], port:port);
fix = "3.0.22";

# Versions < 3.0.22 are vulnerable
if (ver_compare(ver:version, fix:fix, strict:FALSE) < 0)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  URL               : ' + install_url +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fix +
      '\n';
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
}
else audit(AUDIT_LISTEN_NOT_VULN, app_name, port, version);

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-142-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(82125);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2015-1031", "CVE-2015-1381", "CVE-2015-1382");
  script_bugtraq_id(71993, 72354, 72360);

  script_name(english:"Debian DLA-142-1 : privoxy security update");
  script_summary(english:"Checks dpkg output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Several vulnerabilities have been fixed in privoxy, a privacy
enhancing HTTP proxy :

CVE-2015-1031, CID66394 :

unmap(): Prevent use-after-free if the map only consists of one item.

CVE-2015-1031, CID66376 and CID66391 :

pcrs_execute(): Consistently set *result to NULL in case of errors.
Should make use-after-free in the caller less likely.

CVE-2015-1381 :

Fix multiple segmentation faults and memory leaks in the pcrs code.

CVE-2015-1382 :

Fix invalid read to prevent potential crashes.

We recommend that you upgrade your privoxy packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2015/01/msg00016.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/squeeze-lts/privoxy"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected privoxy package."
  );
  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: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:privoxy");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/01/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/26");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2020 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:"6.0", prefix:"privoxy", reference:"3.0.16-1+deb6u1")) 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");

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2018 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(88150);
  script_version("2.3");
  script_cvs_date("Date: 2018/11/21 10:46:31");

  script_cve_id("CVE-2015-1030", "CVE-2015-1031", "CVE-2015-1201");

  script_name(english:"FreeBSD : privoxy -- multiple vulnerabilities (89d4ed09-c3d7-11e5-b5fe-002590263bf5)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Privoxy Developers reports :

Fixed a memory leak when rejecting client connections due to the
socket limit being reached (CID 66382). This affected Privoxy 3.0.21
when compiled with IPv6 support (on most platforms this is the
default).

Fixed an immediate-use-after-free bug (CID 66394) and two additional
unconfirmed use-after-free complaints made by Coverity scan (CID
66391, CID 66376).

MITRE reports :

Privoxy before 3.0.22 allows remote attackers to cause a denial of
service (file descriptor consumption) via unspecified vectors."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195468"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.privoxy.org/3.0.22/user-manual/whatsnew.html"
  );
  # http://www.openwall.com/lists/oss-security/2015/01/11/1
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.openwall.com/lists/oss-security/2015/01/11/1"
  );
  # https://vuxml.freebsd.org/freebsd/89d4ed09-c3d7-11e5-b5fe-002590263bf5.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?10f3c2ab"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:privoxy");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/01/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/01/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/26");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


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


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"privoxy<3.0.22")) flag++;

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