Vulnerabilities > CVE-2019-17514 - Incorrect Calculation vulnerability in Python 3.6.0/3.7.0/3.8.0

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

include("compat.inc");

if (description)
{
  script_id(134741);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/24");

  script_cve_id(
    "CVE-2019-16056",
    "CVE-2019-16935",
    "CVE-2019-17514",
    "CVE-2019-9740",
    "CVE-2019-9947"
  );

  script_name(english:"EulerOS Virtualization 3.0.2.2 : python (EulerOS-SA-2020-1275)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security
updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the python packages installed, the
EulerOS Virtualization installation on the remote host is affected by
the following vulnerabilities :

  - An issue was discovered in Python through 2.7.16, 3.x
    through 3.5.7, 3.6.x through 3.6.9, and 3.7.x through
    3.7.4. The email module wrongly parses email addresses
    that contain multiple @ characters. An application that
    uses the email module and implements some kind of
    checks on the From/To headers of a message could be
    tricked into accepting an email address that should be
    denied. An attack may be the same as in CVE-2019-11340
    however, this CVE applies to Python more
    generally.(CVE-2019-16056)

  - An issue was discovered in urllib2 in Python 2.x
    through 2.7.16 and urllib in Python 3.x through 3.7.3.
    CRLF injection is possible if the attacker controls a
    url parameter, as demonstrated by the first argument to
    urllib.request.urlopen with \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-2019-9947)

  - An issue was discovered in urllib2 in Python 2.x
    through 2.7.16 and urllib in Python 3.x through 3.7.3.
    CRLF injection is possible if the attacker controls a
    url parameter, as demonstrated by the first argument to
    urllib.request.urlopen with \n (specifically in the
    query string after a ? character) followed by an HTTP
    header or a Redis command.(CVE-2019-9740)

  - The documentation XML-RPC server in Python through
    2.7.16, 3.x through 3.6.9, and 3.7.x through 3.7.4 has
    XSS via the server_title field. This occurs in
    Lib/DocXMLRPCServer.py in Python 2.x, and in
    Lib/xmlrpc/server.py in Python 3.x. If set_server_title
    is called with untrusted input, arbitrary JavaScript
    can be delivered to clients that visit the http URL for
    this server.(CVE-2019-16935)

  - library/glob.html in the Python 2 and 3 documentation
    before 2016 has potentially misleading information
    about whether sorting occurs, as demonstrated by
    irreproducible cancer-research results. NOTE: the
    effects of this documentation cross application
    domains, and thus it is likely that security-relevant
    code elsewhere is affected. This issue is not a Python
    implementation bug, and there are no reports that NMR
    researchers were specifically relying on
    library/glob.html. In other words, because the older
    documentation stated 'finds all the pathnames matching
    a specified pattern according to the rules used by the
    Unix shell,' one might have incorrectly inferred that
    the sorting that occurs in a Unix shell also occurred
    for glob.glob. There is a workaround in newer versions
    of Willoughby nmr-data_compilation-p2.py and
    nmr-data_compilation-p3.py, which call sort()
    directly.(CVE-2019-17514)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2020-1275
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c63601ed");
  script_set_attribute(attribute:"solution", value:
"Update the affected python packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:N/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-2019-17514");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:tkinter");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:3.0.2.2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/uvp_version");

  exit(0);
}

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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "3.0.2.2") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.2.2");
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["python-2.7.5-69.h23",
        "python-devel-2.7.5-69.h23",
        "python-libs-2.7.5-69.h23",
        "python-tools-2.7.5-69.h23",
        "tkinter-2.7.5-69.h23"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "python");
}