RHEL 5 : glibc (RHSA-2010:0787) - Nessus

Medium Plugin ID: 50079

This page contains detailed information about the RHEL 5 : glibc (RHSA-2010:0787) 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: 50079
Name: RHEL 5 : glibc (RHSA-2010:0787)
Filename: redhat-RHSA-2010-0787.nasl
Vulnerability Published: 2011-01-07
This Plugin Published: 2010-10-21
Last Modification Time: 2021-01-14
Plugin Version: 1.25
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: 2011-01-07
Patch Published: 2010-10-20
CVE [?]: CVE-2010-3847
CPE [?]: cpe:/o:redhat:enterprise_linux:5, p-cpe:/a:redhat:enterprise_linux:glibc, p-cpe:/a:redhat:enterprise_linux:glibc-common, p-cpe:/a:redhat:enterprise_linux:glibc-devel, p-cpe:/a:redhat:enterprise_linux:glibc-headers, p-cpe:/a:redhat:enterprise_linux:glibc-utils, p-cpe:/a:redhat:enterprise_linux:nscd

Synopsis

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

Description

Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 5.

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.

The glibc packages contain the standard C libraries used by multiple programs on the system. These packages contain the standard C and the standard math libraries. Without these two libraries, a Linux system cannot function properly.

It was discovered that the glibc dynamic linker/loader did not handle the $ORIGIN dynamic string token set in the LD_AUDIT environment variable securely. A local attacker with write access to a file system containing setuid or setgid binaries could use this flaw to escalate their privileges. (CVE-2010-3847)

Red Hat would like to thank Tavis Ormandy for reporting this issue.

All users should upgrade to these updated packages, which contain a backported patch to correct this issue.

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 5 : glibc (RHSA-2010:0787) vulnerability:

Metasploit: exploit/linux/local/glibc_origin_expansion_priv_esc
[glibc "$ORIGIN" Expansion Privilege Escalation]
Metasploit: exploit/linux/local/glibc_ld_audit_dso_load_priv_esc
[glibc LD_AUDIT Arbitrary DSO Load Privilege Escalation]
Metasploit: exploit/linux/local/glibc_origin_expansion_priv_esc
[glibc '$ORIGIN' Expansion Privilege Escalation]
Exploit-DB: exploits/linux/local/15274.txt
[EDB-15274: GNU C library dynamic linker - '$ORIGIN' Expansion]
Exploit-DB: exploits/linux/local/15304.txt
[EDB-15304: GNU C Library 2.x (libc6) - Dynamic Linker LD_AUDIT Arbitrary DSO Load Privilege Escalation]
Exploit-DB: exploits/linux/local/44024.rb
[EDB-44024: glibc - '$ORIGIN' Expansion Privilege Escalation (Metasploit)]
Exploit-DB: exploits/linux/local/44025.rb
[EDB-44025: glibc - 'LD_AUDIT' Arbitrary DSO Load Privilege Escalation (Metasploit)]
GitHub: https://github.com/grzegorzblaszczyk/CVE-2010-4476-check
[CVE-2010-3847]
GitHub: https://github.com/magisterquis/cve-2010-3847
[CVE-2010-3847: Script to take advantage of CVE-2010-3847]
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/E:F/RL:OF/RC:C

CVSS Base Score:	6.9 (Medium)
Impact Subscore:	10.0
Exploitability Subscore:	3.4
CVSS Temporal Score:	5.7 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.7 (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-2010:0787. The text 
# itself is copyright (C) Red Hat, Inc.
#

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

if (description)
{
  script_id(50079);
  script_version("1.25");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2010-3847");
  script_bugtraq_id(44154);
  script_xref(name:"RHSA", value:"2010:0787");

  script_name(english:"RHEL 5 : glibc (RHSA-2010:0787)");
  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 glibc packages that fix one security issue are now available
for Red Hat Enterprise Linux 5.

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.

The glibc packages contain the standard C libraries used by multiple
programs on the system. These packages contain the standard C and the
standard math libraries. Without these two libraries, a Linux system
cannot function properly.

It was discovered that the glibc dynamic linker/loader did not handle
the $ORIGIN dynamic string token set in the LD_AUDIT environment
variable securely. A local attacker with write access to a file system
containing setuid or setgid binaries could use this flaw to escalate
their privileges. (CVE-2010-3847)

Red Hat would like to thank Tavis Ormandy for reporting this issue.

All users should upgrade to these updated packages, which contain a
backported patch to correct this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2010-3847"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2010:0787"
  );
  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_cvss_temporal_vector("CVSS2#E:F/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:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'glibc "$ORIGIN" Expansion 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:glibc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glibc-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glibc-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glibc-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glibc-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:nscd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/01/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2010/10/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/10/21");
  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([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 5.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-2010:0787";
  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:"RHEL5", reference:"glibc-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"glibc-common-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"glibc-common-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"glibc-common-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", reference:"glibc-devel-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"glibc-headers-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"glibc-headers-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"glibc-headers-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"glibc-utils-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"glibc-utils-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"glibc-utils-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"nscd-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"nscd-2.5-49.el5_5.6")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"nscd-2.5-49.el5_5.6")) 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, "glibc / glibc-common / glibc-devel / glibc-headers / glibc-utils / 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-2010-0787.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\redhat-RHSA-2010-0787.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/redhat-RHSA-2010-0787.nasl

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How to Run

Here is how to run the RHEL 5 : glibc (RHSA-2010:0787) 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 : glibc (RHSA-2010:0787) plugin ID 50079.
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-2010-0787.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a redhat-RHSA-2010-0787.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-2010-0787.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-2010-0787.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

44154

RHSA | Red Hat Security Advisory:

2010:0787

See also:

Similar and related Nessus plugins:

50795 - CentOS 5 : glibc (CESA-2010:0787)
53430 - CentOS 5 : glibc (CESA-2011:0412)
50309 - Debian DSA-2122-1 : glibc - missing input sanitization
50036 - Fedora 14 : glibc-2.12.90-17 (2010-16308)
50312 - Fedora 13 : glibc-2.12.1-3 (2010-16594)
50421 - Fedora 12 : glibc-2.11.2-3 (2010-16641)
50605 - GLSA-201011-01 : GNU C library: Multiple vulnerabilities
71167 - GLSA-201312-01 : GNU C Library: Multiple vulnerabilities
50076 - Mandriva Linux Security Advisory : glibc (MDVSA-2010:207)
127161 - NewStart CGSL MAIN 5.04 : glibc Multiple Vulnerabilities (NS-SA-2019-0012)
68123 - Oracle Linux 5 : glibc (ELSA-2010-0787)
68141 - Oracle Linux 6 : glibc (ELSA-2010-0872)
68244 - Oracle Linux 5 : glibc (ELSA-2011-0412)
68245 - Oracle Linux 6 : glibc (ELSA-2011-0413)
81118 - OracleVM 3.2 : glibc (OVMSA-2015-0023) (GHOST)
50640 - RHEL 6 : glibc (RHSA-2010:0872)
53291 - RHEL 5 : glibc (RHSA-2011:0412)
53292 - RHEL 6 : glibc (RHSA-2011:0413)
60874 - Scientific Linux Security Update : glibc on SL5.x i386/x86_64
60891 - Scientific Linux Security Update : glibc on SL6.x i386/x86_64
61008 - Scientific Linux Security Update : glibc on SL5.x,SL6.x i386/x86_64
50308 - Slackware 12.0 / 12.1 / 12.2 / 13.0 / 13.1 / current : glibc (SSA:2010-295-01)
50367 - openSUSE Security Update : glibc (openSUSE-SU-2010:0914-1)
50373 - openSUSE Security Update : glibc (openSUSE-SU-2010:0913-1)
75518 - openSUSE Security Update : glibc (openSUSE-SU-2010:0912-1)
50912 - SuSE 11 / 11.1 Security Update : glibc (SAT Patch Numbers 3392 / 3393)
50377 - SuSE 10 Security Update : glibc (ZYPP Patch Number 7201)
50318 - Ubuntu 8.04 LTS / 9.04 / 9.10 / 10.04 LTS / 10.10 : glibc, eglibc vulnerabilities (USN-1009-1)
51501 - Ubuntu 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : eglibc, glibc vulnerability (USN-1009-2)
51422 - VMSA-2011-0001 : VMware ESX third-party updates for Service Console packages glibc, sudo, and openldap
89673 - VMware ESX Third-Party Libraries Multiple Vulnerabilities (VMSA-2011-0001) (remote check)
55747 - VMSA-2011-0010 : VMware ESX third-party updates for Service Console packages glibc and dhcp
89679 - VMware ESX Third-Party Libraries Multiple Vulnerabilities (VMSA-2011-0010) (remote check)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file redhat-RHSA-2010-0787.nasl version 1.25. For more plugins, visit the Nessus Plugin Library.

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RHEL 5 : glibc (RHSA-2010:0787) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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