RHEL 5 / 6 : systemtap (RHSA-2010:0894) - Nessus

High Plugin ID: 50646

This page contains detailed information about the RHEL 5 / 6 : systemtap (RHSA-2010:0894) 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: 50646
Name: RHEL 5 / 6 : systemtap (RHSA-2010:0894)
Filename: redhat-RHSA-2010-0894.nasl
Vulnerability Published: 2010-12-07
This Plugin Published: 2010-11-18
Last Modification Time: 2021-01-14
Plugin Version: 1.21
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

Synopsis

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

Description

Updated systemtap packages that fix two security issues are now available for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having important 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.

SystemTap is an instrumentation system for systems running the Linux kernel, version 2.6. Developers can write scripts to collect data on the operation of the system. staprun, the SystemTap runtime tool, is used for managing SystemTap kernel modules (for example, loading them).

It was discovered that staprun did not properly sanitize the environment before executing the modprobe command to load an additional kernel module. A local, unprivileged user could use this flaw to escalate their privileges. (CVE-2010-4170)

It was discovered that staprun did not check if the module to be unloaded was previously loaded by SystemTap. A local, unprivileged user could use this flaw to unload an arbitrary kernel module that was not in use. (CVE-2010-4171)

Note: After installing this update, users already in the stapdev group must be added to the stapusr group in order to be able to run the staprun tool.

Red Hat would like to thank Tavis Ormandy for reporting these issues.

SystemTap users should upgrade to these updated packages, which contain backported patches to correct these issues.

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)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the RHEL 5 / 6 : systemtap (RHSA-2010:0894) vulnerability:

Metasploit: exploit/linux/local/systemtap_modprobe_options_priv_esc
[SystemTap MODPROBE_OPTIONS Privilege Escalation]
Exploit-DB: exploits/linux/local/15620.sh
[EDB-15620: SystemTap - Local Privilege Escalation]
Exploit-DB: exploits/linux/local/46730.rb
[EDB-46730: SystemTap 1.3 - MODPROBE_OPTIONS Privilege Escalation (Metasploit)]

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:L/Au:N/C:C/I:C/A:C

CVSS Base Score:	7.2 (High)
Impact Subscore:	10.0
Exploitability Subscore:	3.9
CVSS Temporal Score:	NA (None)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.2 (High)

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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-2010:0894. The text 
# itself is copyright (C) Red Hat, Inc.
#

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

if (description)
{
  script_id(50646);
  script_version("1.21");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2010-4170", "CVE-2010-4171");
  script_xref(name:"RHSA", value:"2010:0894");

  script_name(english:"RHEL 5 / 6 : systemtap (RHSA-2010:0894)");
  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 systemtap packages that fix two security issues are now
available for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having
important 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.

SystemTap is an instrumentation system for systems running the Linux
kernel, version 2.6. Developers can write scripts to collect data on
the operation of the system. staprun, the SystemTap runtime tool, is
used for managing SystemTap kernel modules (for example, loading
them).

It was discovered that staprun did not properly sanitize the
environment before executing the modprobe command to load an
additional kernel module. A local, unprivileged user could use this
flaw to escalate their privileges. (CVE-2010-4170)

It was discovered that staprun did not check if the module to be
unloaded was previously loaded by SystemTap. A local, unprivileged
user could use this flaw to unload an arbitrary kernel module that was
not in use. (CVE-2010-4171)

Note: After installing this update, users already in the stapdev group
must be added to the stapusr group in order to be able to run the
staprun tool.

Red Hat would like to thank Tavis Ormandy for reporting these issues.

SystemTap 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-2010-4170"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2010-4171"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2010:0894"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/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:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'SystemTap MODPROBE_OPTIONS Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap-grapher");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap-initscript");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap-runtime");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap-sdt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:systemtap-testsuite");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
  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:"2010/12/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2010/11/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/11/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2010-2021 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:"^(5|6)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 5.x / 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-2010:0894";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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:"RHEL5", cpu:"i386", reference:"systemtap-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"systemtap-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"systemtap-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"systemtap-client-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"systemtap-client-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"systemtap-client-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"systemtap-initscript-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"systemtap-initscript-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"systemtap-initscript-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"systemtap-runtime-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"systemtap-runtime-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"systemtap-runtime-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", reference:"systemtap-sdt-devel-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"systemtap-server-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"systemtap-server-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"systemtap-server-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"systemtap-testsuite-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"systemtap-testsuite-1.1-3.el5_5.3")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"systemtap-testsuite-1.1-3.el5_5.3")) flag++;


  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"systemtap-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"systemtap-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"systemtap-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"systemtap-client-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"systemtap-client-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"systemtap-client-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", reference:"systemtap-debuginfo-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"systemtap-grapher-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"systemtap-grapher-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"systemtap-grapher-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"systemtap-initscript-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"systemtap-initscript-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"systemtap-initscript-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"systemtap-runtime-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"systemtap-runtime-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"systemtap-runtime-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", reference:"systemtap-sdt-devel-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"systemtap-server-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"systemtap-server-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"systemtap-server-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"systemtap-testsuite-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"systemtap-testsuite-1.2-11.el6_0")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"systemtap-testsuite-1.2-11.el6_0")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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, "systemtap / systemtap-client / systemtap-debuginfo / 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-2010-0894.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\redhat-RHSA-2010-0894.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/redhat-RHSA-2010-0894.nasl

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How to Run

Here is how to run the RHEL 5 / 6 : systemtap (RHSA-2010:0894) 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 5 / 6 : systemtap (RHSA-2010:0894) plugin ID 50646.
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-2010-0894.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a redhat-RHSA-2010-0894.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-2010-0894.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-2010-0894.nasl -t <IP/HOST>

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References

RHSA | Red Hat Security Advisory:

2010:0894

See also:

Similar and related Nessus plugins:

50809 - CentOS 5 : systemtap (CESA-2010:0894)
50810 - CentOS 4 : systemtap (CESA-2010:0895)
56881 - Debian DSA-2348-1 : systemtap - several vulnerabilities
50655 - Fedora 14 : systemtap-1.3-3.fc14 (2010-17865)
50656 - Fedora 12 : systemtap-1.3-3.fc12 (2010-17868)
50657 - Fedora 13 : systemtap-1.3-3.fc13 (2010-17873)
54835 - Fedora 13 : systemtap-1.4-6.fc13 (2011-7289)
54836 - Fedora 14 : systemtap-1.4-6.fc14 (2011-7302)
68146 - Oracle Linux 5 / 6 : systemtap (ELSA-2010-0894)
68147 - Oracle Linux 4 : systemtap (ELSA-2010-0895)
50647 - RHEL 4 : systemtap (RHSA-2010:0895)
60903 - Scientific Linux Security Update : systemtap on SL4.x i386/x86_64
60904 - Scientific Linux Security Update : systemtap on SL5.x i386/x86_64

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file redhat-RHSA-2010-0894.nasl version 1.21. For more plugins, visit the Nessus Plugin Library.

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RHEL 5 / 6 : systemtap (RHSA-2010:0894) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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