Vulnerabilities > CVE-2019-9948 - Path Traversal vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1834-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(126222);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/10");

  script_cve_id("CVE-2018-14647", "CVE-2019-10160", "CVE-2019-5010", "CVE-2019-9636", "CVE-2019-9740", "CVE-2019-9947", "CVE-2019-9948");

  script_name(english:"Debian DLA-1834-1 : python2.7 security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Multiple vulnerabilities were discovered in Python, an interactive
high-level object-oriented language, including 

CVE-2018-14647

Python's elementtree C accelerator failed to initialise Expat's hash
salt during initialization. This could make it easy to conduct denial
of service attacks against Expat by constructing an XML document that
would cause pathological hash collisions in Expat's internal data
structures, consuming large amounts CPU and RAM.

CVE-2019-5010

NULL pointer dereference using a specially crafted X509 certificate.

CVE-2019-9636

Improper Handling of Unicode Encoding (with an incorrect netloc)
during NFKC normalization resulting in information disclosure
(credentials, cookies, etc. that are cached against a given hostname).
A specially crafted URL could be incorrectly parsed to locate cookies
or authentication data and send that information to a different host
than when parsed correctly.

CVE-2019-9740

An issue was discovered in urllib2 where CRLF injection is possible if
the attacker controls a url parameter, as demonstrated by the first
argument to urllib.request.urlopen with \r\n (specifically in the
query string after a ? character) followed by an HTTP header or a
Redis command.

CVE-2019-9947

An issue was discovered in urllib2 where CRLF injection is possible if
the attacker controls a url parameter, as demonstrated by the first
argument to urllib.request.urlopen with \r\n (specifically in the path
component of a URL that lacks a ? character) followed by an HTTP
header or a Redis command. This is similar to the CVE-2019-9740 query
string issue.

CVE-2019-9948

urllib supports the local_file: scheme, which makes it easier for
remote attackers to bypass protection mechanisms that blacklist file:
URIs, as demonstrated by triggering a
urllib.urlopen('local_file:///etc/passwd') call.

CVE-2019-10160

A security regression of CVE-2019-9636 was discovered which still
allows an attacker to exploit CVE-2019-9636 by abusing the user and
password parts of a URL. When an application parses user-supplied URLs
to store cookies, authentication credentials, or other kind of
information, it is possible for an attacker to provide specially
crafted URLs to make the application locate host-related information
(e.g. cookies, authentication data) and send them to a different host
than where it should, unlike if the URLs had been correctly parsed.
The result of an attack may vary based on the application.

For Debian 8 'Jessie', these problems have been fixed in version
2.7.9-2+deb8u3.

We recommend that you upgrade your python2.7 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/2019/06/msg00022.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/python2.7"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-9948");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:idle-python2.7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpython2.7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpython2.7-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpython2.7-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpython2.7-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpython2.7-stdlib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpython2.7-testsuite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python2.7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python2.7-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python2.7-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python2.7-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python2.7-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python2.7-minimal");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/09/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/06/25");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 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:"8.0", prefix:"idle-python2.7", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libpython2.7", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libpython2.7-dbg", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libpython2.7-dev", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libpython2.7-minimal", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libpython2.7-stdlib", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libpython2.7-testsuite", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"python2.7", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"python2.7-dbg", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"python2.7-dev", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"python2.7-doc", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"python2.7-examples", reference:"2.7.9-2+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"python2.7-minimal", reference:"2.7.9-2+deb8u3")) 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");

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2020 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(126534);
  script_version("1.2");
  script_cvs_date("Date: 2020/01/08");

  script_cve_id("CVE-2019-9740", "CVE-2019-9948");

  script_name(english:"FreeBSD : python 3.6 -- multiple vulnerabilities (18ed9650-a1d6-11e9-9b17-fcaa147e860e)");
  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:
"Python changelog :

bpo-35907: CVE-2019-9948: Avoid file reading by disallowing
local-file:// and local_file:// URL schemes in URLopener().open() and
URLopener().retrieve() of urllib.request.

bpo-36742: Fixes mishandling of pre-normalization characters in
urlsplit().

bpo-30458: Address CVE-2019-9740 by disallowing URL paths with
embedded whitespace or control characters through into the underlying
http client request. Such potentially malicious header injection URLs
now cause an http.client.InvalidURL exception to be raised.

bpo-36216: Changes urlsplit() to raise ValueError when the URL
contains characters that decompose under IDNA encoding
(NFKC-normalization) into characters that affect how the URL is
parsed.

bpo-33529: Prevent fold function used in email header encoding from
entering infinite loop when there are too many non-ASCII characters in
a header.

bpo-35121: Don't send cookies of domain A without Domain attribute to
domain B when domain A is a suffix match of domain B while using a
cookiejar with http.cookiejar.DefaultCookiePolicy policy. Patch by
Karthikeyan Singaravelan."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://docs.python.org/3.6/whatsnew/changelog.html#python-3-6-9-final"
  );
  # https://vuxml.freebsd.org/freebsd/18ed9650-a1d6-11e9-9b17-fcaa147e860e.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?1a784875"
  );
  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:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:python36");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/09");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 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:"python36<3.6.9")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get());
  else security_warning(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 Gentoo Linux Security Advisory GLSA 202003-26.
#
# The advisory text is Copyright (C) 2001-2020 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(134603);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/18");

  script_cve_id("CVE-2018-20852", "CVE-2019-5010", "CVE-2019-9636", "CVE-2019-9740", "CVE-2019-9947", "CVE-2019-9948");
  script_xref(name:"GLSA", value:"202003-26");

  script_name(english:"GLSA-202003-26 : Python: Multiple vulnerabilities");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-202003-26
(Python: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Python. Please review
      the CVE identifiers referenced below for details.
  
Impact :

    A remote attacker could possibly perform a CRLF injection attack, obtain
      sensitive information, trick Python into sending cookies to the wrong
      domain or cause a Denial of Service condition.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/202003-26"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Python 2.7.x users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=dev-lang/python-2.7.17:2.7'
    All Python 3.5.x users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=dev-lang/python-3.5.7:3.5/3.5m'
    All Python 3.6.x users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=dev-lang/python-3.6.9:3.6/3.6m'
    All Python 3.7x users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=dev-lang/python-3.7.4:3.7/3.7m'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-9948");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:python");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/16");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"dev-lang/python", unaffected:make_list("ge 2.7.17", "ge 3.5.7", "ge 3.6.9", "ge 3.7.4"), vulnerable:make_list("lt 2.7.17", "lt 3.5.7", "lt 3.6.9", "lt 3.7.4"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Python");
}