Vulnerabilities > CVE-2011-1521 - Resource Management Errors vulnerability in Python

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The text description of this plugin is (C) Novell, Inc.
#

include("compat.inc");

if (description)
{
  script_id(57248);
  script_version ("1.4");
  script_cvs_date("Date: 2019/10/25 13:36:43");

  script_cve_id("CVE-2011-1521");

  script_name(english:"SuSE 10 Security Update : python (ZYPP Patch Number 7506)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SuSE 10 host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update of python fixes a possible denial of service bug or
information leakage vulnerability while using user-crafted ftp:// or
file:// URLs with urllib(2).

CVE-2011-1521: CVSS v2 Base Score: 6.4 (AV:N/AC:L/Au:N/C:P/I:N/A:P)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2011-1521.html"
  );
  script_set_attribute(attribute:"solution", value:"Apply ZYPP patch number 7506.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:suse:suse_linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/05/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/12/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2019 Tenable Network Security, Inc.");
  script_family(english:"SuSE Local Security Checks");

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

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) exit(0, "Local checks are not enabled.");
if (!get_kb_item("Host/SuSE/release")) exit(0, "The host is not running SuSE.");
if (!get_kb_item("Host/SuSE/rpm-list")) exit(1, "Could not obtain the list of installed packages.");

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) exit(1, "Failed to determine the architecture type.");
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") exit(1, "Local checks for SuSE 10 on the '"+cpu+"' architecture have not been implemented.");


flag = 0;
if (rpm_check(release:"SLED10", sp:4, reference:"python-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLED10", sp:4, reference:"python-curses-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLED10", sp:4, reference:"python-devel-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLED10", sp:4, reference:"python-gdbm-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLED10", sp:4, reference:"python-tk-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLED10", sp:4, reference:"python-xml-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLED10", sp:4, cpu:"x86_64", reference:"python-32bit-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, reference:"python-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, reference:"python-curses-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, reference:"python-demo-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, reference:"python-devel-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, reference:"python-gdbm-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, reference:"python-idle-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, reference:"python-tk-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, reference:"python-xml-2.4.2-18.37.1")) flag++;
if (rpm_check(release:"SLES10", sp:4, cpu:"x86_64", reference:"python-32bit-2.4.2-18.37.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else exit(0, "The host is not affected.");

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2011:0491. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(53820);
  script_version ("1.20");
  script_cvs_date("Date: 2019/10/25 13:36:16");

  script_cve_id("CVE-2009-3720", "CVE-2010-1634", "CVE-2010-2089", "CVE-2010-3493", "CVE-2011-1015", "CVE-2011-1521");
  script_bugtraq_id(36097, 40370, 40863, 44533, 46541, 47024);
  script_xref(name:"RHSA", value:"2011:0491");

  script_name(english:"RHEL 4 : python (RHSA-2011:0491)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated python packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 4.

The Red Hat Security Response Team has rated this update as having
moderate security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.

Python is an interpreted, interactive, object-oriented programming
language.

A flaw was found in the Python urllib and urllib2 libraries where they
would not differentiate between different target URLs when handling
automatic redirects. This caused Python applications using these
modules to follow any new URL that they understood, including the
'file://' URL type. This could allow a remote server to force a local
Python application to read a local file instead of the remote one,
possibly exposing local files that were not meant to be exposed.
(CVE-2011-1521)

Multiple flaws were found in the Python audioop module. Supplying
certain inputs could cause the audioop module to crash or, possibly,
execute arbitrary code. (CVE-2010-1634, CVE-2010-2089)

A race condition was found in the way the Python smtpd module handled
new connections. A remote user could use this flaw to cause a Python
script using the smtpd module to terminate. (CVE-2010-3493)

An information disclosure flaw was found in the way the Python
CGIHTTPServer module processed certain HTTP GET requests. A remote
attacker could use a specially crafted request to obtain the CGI
script's source code. (CVE-2011-1015)

A buffer over-read flaw was found in the way the Python Expat parser
handled malformed UTF-8 sequences when processing XML files. A
specially crafted XML file could cause Python applications using the
Python Expat parser to crash while parsing the file. (CVE-2009-3720)

This update makes Python use the system Expat library rather than its
own internal copy; therefore, users must have the version of Expat
shipped with RHSA-2009:1625 installed, or a later version, to resolve
the CVE-2009-3720 issue.

All Python users should upgrade to these updated packages, which
contain backported patches to correct these issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2009-3720"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2010-1634"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2010-2089"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2010-3493"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2011-1015"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2011-1521"
  );
  # https://rhn.redhat.com/errata/RHSA-2009-1625.html
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2009:1625"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2011:0491"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tkinter");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4.8");

  script_set_attribute(attribute:"vuln_publication_date", value:"2009/11/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/05/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/05/06");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

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

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^4([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 4.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2011:0491";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL4", reference:"python-2.3.4-14.10.el4")) flag++;

  if (rpm_check(release:"RHEL4", reference:"python-devel-2.3.4-14.10.el4")) flag++;

  if (rpm_check(release:"RHEL4", reference:"python-docs-2.3.4-14.10.el4")) flag++;

  if (rpm_check(release:"RHEL4", reference:"python-tools-2.3.4-14.10.el4")) flag++;

  if (rpm_check(release:"RHEL4", reference:"tkinter-2.3.4-14.10.el4")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "python / python-devel / python-docs / python-tools / tkinter");
  }
}