Executive Summary

Summary
Titleexim security update
Informations
NameRHSA-2010:0970First vendor Publication2010-12-10
VendorRedHatLast vendor Modification2010-12-10
Severity (Vendor) CriticalRevision01

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score9.3Attack RangeNetwork
Cvss Impact Score10Attack ComplexityMedium
Cvss Expoit Score8.6AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux (v. 5.3.z server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux (v. 5.4.z server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux AS version 4.7.z - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux ES version 4.7.z - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Description:

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.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

661756 - CVE-2010-4344 exim remote code execution flaw

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2010-0970.html

CWE : Common Weakness Enumeration

idName
CWE-119Failure to Constrain Operations within the Bounds of a Memory Buffer

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:22059
 
Oval ID: oval:org.mitre.oval:def:22059
Title: RHSA-2010:0970: exim security update (Critical)
Description: Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.
Family: unix Class: patch
Reference(s): RHSA-2010:0970-01
CVE-2010-4344
Version: 4
Platform(s): Red Hat Enterprise Linux 5
Product(s): exim
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23061
 
Oval ID: oval:org.mitre.oval:def:23061
Title: ELSA-2010:0970: exim security update (Critical)
Description: Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.
Family: unix Class: patch
Reference(s): ELSA-2010:0970-01
CVE-2010-4344
Version: 3
Platform(s): Oracle Linux 4
Oracle Linux 5
Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application64

OpenVAS Exploits

DateDescription
2012-07-30Name : CentOS Update for exim CESA-2010:0970 centos4 x86_64
File : nvt/gb_CESA-2010_0970_exim_centos4_x86_64.nasl
2011-01-31Name : CentOS Update for exim CESA-2010:0970 centos4 i386
File : nvt/gb_CESA-2010_0970_exim_centos4_i386.nasl
2011-01-04Name : SuSE Update for exim SUSE-SA:2010:059
File : nvt/gb_suse_2010_059.nasl
2010-12-28Name : Ubuntu Update for exim4 vulnerability USN-1032-1
File : nvt/gb_ubuntu_USN_1032_1.nasl
2010-12-28Name : RedHat Update for exim RHSA-2010:0970-01
File : nvt/gb_RHSA-2010_0970-01_exim.nasl

Open Source Vulnerability Database (OSVDB)

idDescription
69685Exim string_format Function Remote Overflow

Metasploit Database

idDescription
2010-12-07 Exim4 string_format Function Heap Buffer Overflow

Nessus® Vulnerability Scanner

DateDescription
2014-01-28Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201401-32.nasl - Type : ACT_GATHER_INFO
2013-07-12Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-0970.nasl - Type : ACT_GATHER_INFO
2012-08-01Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20101210_exim_on_SL4_x.nasl - Type : ACT_GATHER_INFO
2011-05-05Name : The remote SuSE system is missing a security patch for exim
File : suse_11_1_exim-101211.nasl - Type : ACT_GATHER_INFO
2011-05-05Name : The remote SuSE system is missing a security patch for exim
File : suse_11_2_exim-101211.nasl - Type : ACT_GATHER_INFO
2011-01-28Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2010-0970.nasl - Type : ACT_GATHER_INFO
2010-12-15Name : The remote service has a buffer overflow.
File : exim_string_vformat.nasl - Type : ACT_ATTACK
2010-12-12Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1032-1.nasl - Type : ACT_GATHER_INFO
2010-12-12Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0970.nasl - Type : ACT_GATHER_INFO
2010-12-12Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2131.nasl - Type : ACT_GATHER_INFO

Alert History

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DateInformations
2014-02-17 11:54:10
  • Multiple Updates