RHEL 6 : polkit (RHSA-2011:0455) - Nessus

Medium Plugin ID: 53500

This page contains detailed information about the RHEL 6 : polkit (RHSA-2011:0455) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 53500
Name: RHEL 6 : polkit (RHSA-2011:0455)
Filename: redhat-RHSA-2011-0455.nasl
Vulnerability Published: 2011-05-31
This Plugin Published: 2011-04-20
Last Modification Time: 2021-01-14
Plugin Version: 1.19
Plugin Type: local
Plugin Family: Red Hat Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

Severity: Medium
Vulnerability Published: 2011-05-31
Patch Published: 2011-04-19
CVE [?]: CVE-2011-1485
CPE [?]: cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:6.0, p-cpe:/a:redhat:enterprise_linux:polkit, p-cpe:/a:redhat:enterprise_linux:polkit-debuginfo, p-cpe:/a:redhat:enterprise_linux:polkit-desktop-policy, p-cpe:/a:redhat:enterprise_linux:polkit-devel, p-cpe:/a:redhat:enterprise_linux:polkit-docs

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated polkit packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

PolicyKit is a toolkit for defining and handling authorizations.

A race condition flaw was found in the PolicyKit pkexec utility and polkitd daemon. A local user could use this flaw to appear as a privileged user to pkexec, allowing them to execute arbitrary commands as root by running those commands with pkexec. (CVE-2011-1485)

Red Hat would like to thank Neel Mehta of Google for reporting this issue.

All polkit users should upgrade to these updated packages, which contain backported patches to correct this issue. The system must be rebooted for this update to take effect.

Solution

Update the affected packages.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, Immunity Canvas, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the RHEL 6 : polkit (RHSA-2011:0455) vulnerability:

Metasploit: exploit/linux/local/pkexec
[Linux PolicyKit Race Condition Privilege Escalation]
Exploit-DB: exploits/linux/local/17932.c
[EDB-17932: PolicyKit polkit-1 < 0.101 - Local Privilege Escalation]
Exploit-DB: exploits/linux/local/17942.c
[EDB-17942: pkexec - Race Condition Privilege Escalation]
Exploit-DB: exploits/linux/local/35021.rb
[EDB-35021: Linux PolicyKit - Race Condition Privilege Escalation (Metasploit)]
GitHub: https://github.com/Pashkela/CVE-2011-1485
[CVE-2011-1485: CVE-2011-1485 - Published: 2011-04-01 - PolicyKit:]
GitHub: https://github.com/Snoopy-Sec/Localroot-ALL-CVE
[CVE-2011-1485]
GitHub: https://github.com/cedelasen/htb-laboratory
[CVE-2011-1485]
Immunity Canvas: CANVAS

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS Base Score:	6.9 (Medium)
Impact Subscore:	10.0
Exploitability Subscore:	3.4
CVSS Temporal Score:	NA (None)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.9 (Medium)

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Plugin Source

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2011:0455. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(53500);
  script_version("1.19");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2011-1485");
  script_xref(name:"RHSA", value:"2011:0455");

  script_name(english:"RHEL 6 : polkit (RHSA-2011:0455)");
  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 polkit packages that fix one security issue are now available
for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System
(CVSS) base score, which gives a detailed severity rating, is
available from the CVE link in the References section.

PolicyKit is a toolkit for defining and handling authorizations.

A race condition flaw was found in the PolicyKit pkexec utility and
polkitd daemon. A local user could use this flaw to appear as a
privileged user to pkexec, allowing them to execute arbitrary commands
as root by running those commands with pkexec. (CVE-2011-1485)

Red Hat would like to thank Neel Mehta of Google for reporting this
issue.

All polkit users should upgrade to these updated packages, which
contain backported patches to correct this issue. The system must be
rebooted for this update to take effect."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2011-1485"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2011:0455"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Linux PolicyKit Race Condition Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:polkit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:polkit-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:polkit-desktop-policy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:polkit-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:polkit-docs");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/05/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/04/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/04/20");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2021 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:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.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-2011:0455";
  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:"RHEL6", reference:"polkit-0.96-2.el6_0.1")) flag++;

  if (rpm_check(release:"RHEL6", reference:"polkit-debuginfo-0.96-2.el6_0.1")) flag++;

  if (rpm_check(release:"RHEL6", reference:"polkit-desktop-policy-0.96-2.el6_0.1")) flag++;

  if (rpm_check(release:"RHEL6", reference:"polkit-devel-0.96-2.el6_0.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"polkit-docs-0.96-2.el6_0.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"polkit-docs-0.96-2.el6_0.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"polkit-docs-0.96-2.el6_0.1")) 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, "polkit / polkit-debuginfo / polkit-desktop-policy / polkit-devel / etc");
  }
}

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/redhat-RHSA-2011-0455.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\redhat-RHSA-2011-0455.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/redhat-RHSA-2011-0455.nasl

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How to Run

Here is how to run the RHEL 6 : polkit (RHSA-2011:0455) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Red Hat Local Security Checks plugin family.
On the right side table select RHEL 6 : polkit (RHSA-2011:0455) plugin ID 53500.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl redhat-RHSA-2011-0455.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a redhat-RHSA-2011-0455.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - redhat-RHSA-2011-0455.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state redhat-RHSA-2011-0455.nasl -t <IP/HOST>

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References

RHSA | Red Hat Security Advisory:

2011:0455

See also:

Similar and related Nessus plugins:

56414 - Debian DSA-2319-1 : policykit-1 - race condition
53537 - Fedora 15 : polkit-0.101-5.fc15 (2011-5589)
53849 - Fedora 14 : polkit-0.98-5.fc14 (2011-5676)
59622 - GLSA-201204-06 : PolicyKit: Multiple vulnerabilities
53910 - Mandriva Linux Security Advisory : polkit (MDVSA-2011:086)
68258 - Oracle Linux 6 : polkit (ELSA-2011-0455)
122573 - OracleVM 3.3 / 3.4 : polkit (OVMSA-2019-0008)
61021 - Scientific Linux Security Update : polkit on SL6.x i386/x86_64
54903 - Slackware 13.1 / current : polkit (SSA:2011-109-01)
75605 - openSUSE Security Update : libpolkit0 (openSUSE-SU-2011:0412-1)
75915 - openSUSE Security Update : libpolkit0 (openSUSE-SU-2011:0413-1)
55075 - Ubuntu 9.10 / 10.04 LTS / 10.10 : policykit-1 vulnerability (USN-1117-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file redhat-RHSA-2011-0455.nasl version 1.19. For more plugins, visit the Nessus Plugin Library.

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RHEL 6 : polkit (RHSA-2011:0455) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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