RHEL 4 / 5 : exim (RHSA-2010:0970) - Nessus

High Plugin ID: 51133

This page contains detailed information about the RHEL 4 / 5 : exim (RHSA-2010:0970) 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: 51133
Name: RHEL 4 / 5 : exim (RHSA-2010:0970)
Filename: redhat-RHSA-2010-0970.nasl
Vulnerability Published: 2010-12-14
This Plugin Published: 2010-12-12
Last Modification Time: 2022-03-28
Plugin Version: 1.28
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: High
Vulnerability Published: 2010-12-14
Patch Published: 2010-12-10
CVE [?]: CVE-2010-4344
CPE [?]: cpe:/o:redhat:enterprise_linux:4, cpe:/o:redhat:enterprise_linux:4.7, cpe:/o:redhat:enterprise_linux:4.8, cpe:/o:redhat:enterprise_linux:5, cpe:/o:redhat:enterprise_linux:5.3, cpe:/o:redhat:enterprise_linux:5.4, p-cpe:/a:redhat:enterprise_linux:exim, p-cpe:/a:redhat:enterprise_linux:exim-doc, p-cpe:/a:redhat:enterprise_linux:exim-mon, p-cpe:/a:redhat:enterprise_linux:exim-sa

Synopsis

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

Description

Updated exim packages that fix one security issue are now available for Red Hat Enterprise Linux 4 and 5, and Red Hat Enterprise Linux 4.7, 5.3, and 5.4 Extended Update Support.

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

Exim is a mail transport agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

A buffer overflow flaw was discovered in Exim's internal string_vformat() function. A remote attacker could use this flaw to execute arbitrary code on the mail server running Exim. (CVE-2010-4344)

Note: successful exploitation would allow a remote attacker to execute arbitrary code as root on a Red Hat Enterprise Linux 4 or 5 system that is running the Exim mail server. An exploit for this issue is known to exist.

For additional information regarding this flaw, along with mitigation advice, please see the Knowledge Base article linked to in the References section of this advisory.

Users of Exim are advised to update to these erratum packages which contain a backported patch to correct this issue. After installing this update, the Exim daemon will be restarted automatically.

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 4 / 5 : exim (RHSA-2010:0970) vulnerability:

Metasploit: exploit/unix/smtp/exim4_string_format
[Exim4 string_format Function Heap Buffer Overflow]
Exploit-DB: exploits/linux/remote/16925.rb
[EDB-16925: Exim4 < 4.69 - string_format Function Heap Buffer Overflow (Metasploit)]
GitHub: https://github.com/byte-mug/cumes
[CVE-2010-4344]
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 Score Source [?]: CVE-2010-4344
CVSS V2 Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C

CVSS Base Score:	9.3 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.6
CVSS Temporal Score:	8.1 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.1 (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-2010:0970. The text 
# itself is copyright (C) Red Hat, Inc.
#

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

if (description)
{
  script_id(51133);
  script_version("1.28");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/03/28");

  script_cve_id("CVE-2010-4344");
  script_bugtraq_id(45308);
  script_xref(name:"RHSA", value:"2010:0970");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/04/15");

  script_name(english:"RHEL 4 / 5 : exim (RHSA-2010:0970)");

  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 exim packages that fix one security issue are now available
for Red Hat Enterprise Linux 4 and 5, and Red Hat Enterprise Linux
4.7, 5.3, and 5.4 Extended Update Support.

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

Exim is a mail transport agent (MTA) developed at the University of
Cambridge for use on Unix systems connected to the Internet.

A buffer overflow flaw was discovered in Exim's internal
string_vformat() function. A remote attacker could use this flaw to
execute arbitrary code on the mail server running Exim.
(CVE-2010-4344)

Note: successful exploitation would allow a remote attacker to execute
arbitrary code as root on a Red Hat Enterprise Linux 4 or 5 system
that is running the Exim mail server. An exploit for this issue is
known to exist.

For additional information regarding this flaw, along with mitigation
advice, please see the Knowledge Base article linked to in the
References section of this advisory.

Users of Exim are advised to update to these erratum packages which
contain a backported patch to correct this issue. After installing
this update, the Exim daemon will be restarted automatically.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2010-4344");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/articles/43788");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2010:0970");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2010-4344");

  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:'Exim4 string_format Function Heap Buffer Overflow');
  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:"vuln_publication_date", value:"2010/12/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2010/12/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/12/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:exim");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:exim-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:exim-mon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:exim-sa");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4.7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4.8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5.3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5.4");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2010-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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|5)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 4.x / 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-2010:0970";
  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
{  sp = get_kb_item("Host/RedHat/minor_release");
  if (isnull(sp)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");

  flag = 0;
if (sp == "7") {   if (rpm_check(release:"RHEL4", sp:"7", reference:"exim-4.43-1.RHEL4.5.el4_7.1")) flag++; }
  else { if (rpm_check(release:"RHEL4", reference:"exim-4.43-1.RHEL4.5.el4_8.1")) flag++; }

if (sp == "7") {   if (rpm_check(release:"RHEL4", sp:"7", reference:"exim-doc-4.43-1.RHEL4.5.el4_7.1")) flag++; }
  else { if (rpm_check(release:"RHEL4", reference:"exim-doc-4.43-1.RHEL4.5.el4_8.1")) flag++; }

if (sp == "7") {   if (rpm_check(release:"RHEL4", sp:"7", reference:"exim-mon-4.43-1.RHEL4.5.el4_7.1")) flag++; }
  else { if (rpm_check(release:"RHEL4", reference:"exim-mon-4.43-1.RHEL4.5.el4_8.1")) flag++; }

if (sp == "7") {   if (rpm_check(release:"RHEL4", sp:"7", reference:"exim-sa-4.43-1.RHEL4.5.el4_7.1")) flag++; }
  else { if (rpm_check(release:"RHEL4", reference:"exim-sa-4.43-1.RHEL4.5.el4_8.1")) flag++; }


if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"i386", reference:"exim-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"i386", reference:"exim-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"i386", reference:"exim-4.63-5.el5_5.2")) flag++; }

if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"s390x", reference:"exim-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"s390x", reference:"exim-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"exim-4.63-5.el5_5.2")) flag++; }

if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"x86_64", reference:"exim-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"x86_64", reference:"exim-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"exim-4.63-5.el5_5.2")) flag++; }

if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"i386", reference:"exim-mon-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"i386", reference:"exim-mon-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"i386", reference:"exim-mon-4.63-5.el5_5.2")) flag++; }

if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"s390x", reference:"exim-mon-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"s390x", reference:"exim-mon-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"exim-mon-4.63-5.el5_5.2")) flag++; }

if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"x86_64", reference:"exim-mon-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"x86_64", reference:"exim-mon-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"exim-mon-4.63-5.el5_5.2")) flag++; }

if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"i386", reference:"exim-sa-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"i386", reference:"exim-sa-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"i386", reference:"exim-sa-4.63-5.el5_5.2")) flag++; }

if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"s390x", reference:"exim-sa-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"s390x", reference:"exim-sa-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"exim-sa-4.63-5.el5_5.2")) flag++; }

if (sp == "4") {   if (rpm_check(release:"RHEL5", sp:"4", cpu:"x86_64", reference:"exim-sa-4.63-3.el5_4.1")) flag++; }
else if (sp == "3") {   if (rpm_check(release:"RHEL5", sp:"3", cpu:"x86_64", reference:"exim-sa-4.63-3.el5_3.1")) flag++; }
  else { if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"exim-sa-4.63-5.el5_5.2")) 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, "exim / exim-doc / exim-mon / exim-sa");
  }
}

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-2010-0970.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\redhat-RHSA-2010-0970.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/redhat-RHSA-2010-0970.nasl

Go back to menu.

How to Run

Here is how to run the RHEL 4 / 5 : exim (RHSA-2010:0970) 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 4 / 5 : exim (RHSA-2010:0970) plugin ID 51133.
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-2010-0970.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a redhat-RHSA-2010-0970.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-2010-0970.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-2010-0970.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

45308

RHSA | Red Hat Security Advisory:

2010:0970

See also:

Similar and related Nessus plugins:

51780 - CentOS 4 : exim (CESA-2010:0970)
51128 - Debian DSA-2131-1 : exim4 - arbitrary code execution
51179 - Exim string_format Function Remote Overflow
72159 - GLSA-201401-32 : Exim: Multiple vulnerabilities
68160 - Oracle Linux 4 / 5 : exim (ELSA-2010-0970)
60919 - Scientific Linux Security Update : exim on SL4.x, SL5.x i386/x86_64
53657 - openSUSE Security Update : exim (openSUSE-SU-2010:1052-1)
53715 - openSUSE Security Update : exim (openSUSE-SU-2010:1052-1)
75481 - openSUSE Security Update : exim (openSUSE-SU-2010:1052-1)
51136 - Ubuntu 6.06 LTS / 8.04 LTS / 9.10 : exim4 vulnerability (USN-1032-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file redhat-RHSA-2010-0970.nasl version 1.28. For more plugins, visit the Nessus Plugin Library.

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RHEL 4 / 5 : exim (RHSA-2010:0970) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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