Executive Summary

Summary
Title exim security update
Informations
Name RHSA-2010:0970 First vendor Publication 2010-12-10
Vendor RedHat Last vendor Modification 2010-12-10
Severity (Vendor) Critical Revision 01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 9.3 Attack Range Network
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None 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

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:13170
 
Oval ID: oval:org.mitre.oval:def:13170
Title: USN-1032-1 -- exim4 vulnerability
Description: Sergey Kononenko and Eugene Bujak discovered that Exim did not correctly truncate string expansions. A remote attacker could send specially crafted email traffic to run arbitrary code as the Exim user, which could also lead to root privileges.
Family: unix Class: patch
Reference(s): USN-1032-1
CVE-2010-4344
 Version: 5
Platform(s): Ubuntu 8.04
Ubuntu 9.10
Ubuntu 6.06
 Product(s): exim4
Definition Synopsis:
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: 6
Platform(s): Oracle Linux 5
 Product(s): exim
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 66

OpenVAS Exploits

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

Open Source Vulnerability Database (OSVDB)

Id Description
69685 Exim string_format Function Remote Overflow

Exim is prone to a remote overflow condition. The string_format function fails to properly sanitize user-supplied input resulting in a heap buffer overflow. With a specially crafted request, a local attacker can potentially cause arbitrary code execution.

Nessus® Vulnerability Scanner

Date Description
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_3_exim-101211.nasl - Type : ACT_GATHER_INFO
2014-01-28 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201401-32.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-0970.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20101210_exim_on_SL4_x.nasl - Type : ACT_GATHER_INFO
2011-05-05 Name : The remote openSUSE host is missing a security update.
File : suse_11_1_exim-101211.nasl - Type : ACT_GATHER_INFO
2011-05-05 Name : The remote openSUSE host is missing a security update.
File : suse_11_2_exim-101211.nasl - Type : ACT_GATHER_INFO
2011-01-28 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2010-0970.nasl - Type : ACT_GATHER_INFO
2010-12-15 Name : The remote service has a buffer overflow.
File : exim_string_vformat.nasl - Type : ACT_ATTACK
2010-12-12 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2131.nasl - Type : ACT_GATHER_INFO
2010-12-12 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0970.nasl - Type : ACT_GATHER_INFO
2010-12-12 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1032-1.nasl - Type : ACT_GATHER_INFO

Alert History

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0
Date Informations
2014-02-17 11:54:10
  • Multiple Updates