Executive Summary

Summary
Title Exim vulnerabilities
Informations
Name USN-1060-1 First vendor Publication 2011-02-10
Vendor Ubuntu Last vendor Modification 2011-02-10
Severity (Vendor) N/A Revision N/A

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:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects the following Ubuntu releases:

Ubuntu 6.06 LTS Ubuntu 8.04 LTS Ubuntu 9.10 Ubuntu 10.04 LTS Ubuntu 10.10

This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.

The problem can be corrected by upgrading your system to the following package versions:

Ubuntu 6.06 LTS:
exim4-daemon-custom 4.60-3ubuntu3.3
exim4-daemon-heavy 4.60-3ubuntu3.3
exim4-daemon-light 4.60-3ubuntu3.3

Ubuntu 8.04 LTS:
exim4-daemon-custom 4.69-2ubuntu0.3
exim4-daemon-heavy 4.69-2ubuntu0.3
exim4-daemon-light 4.69-2ubuntu0.3

Ubuntu 9.10:
exim4-daemon-custom 4.69-11ubuntu4.2
exim4-daemon-heavy 4.69-11ubuntu4.2
exim4-daemon-light 4.69-11ubuntu4.2

Ubuntu 10.04 LTS:
exim4-daemon-custom 4.71-3ubuntu1.1
exim4-daemon-heavy 4.71-3ubuntu1.1
exim4-daemon-light 4.71-3ubuntu1.1

Ubuntu 10.10:
exim4-daemon-custom 4.72-1ubuntu1.1
exim4-daemon-heavy 4.72-1ubuntu1.1
exim4-daemon-light 4.72-1ubuntu1.1

In general, a standard system update will make all the necessary changes.

ATTENTION: This security update brings changes to Exim's behaviour. Please review the following information carefully, as your Exim configuration may need to be adjusted after applying this update.

Exim no longer runs alternate configuration files specified with the -C option as root. The new /etc/exim4/trusted_configs file can be used to override this new behaviour. Files listed in trusted_configs and owned by root will be run with root privileges when using the -C option.

In addition, Exim no longer runs as root when the -D option is used. Macro definitions that require root privileges should now be placed in trusted configuration files.

Please see the /usr/share/doc/exim4-*/NEWS.Debian file for detailed information.

Details follow:

It was discovered that Exim contained a design flaw in the way it processed alternate configuration files. An attacker that obtained privileges of the "Debian-exim" user could use an alternate configuration file to obtain root privileges. (CVE-2010-4345)

It was discovered that Exim incorrectly handled certain return values when handling logging. A local attacker could use this flaw to obtain root privileges. (CVE-2011-0017)

Dan Rosenberg discovered that Exim incorrectly handled writable sticky-bit mail directories. If Exim were configured in this manner, a local user could use this flaw to cause a denial of service or possibly gain privileges. This issue only applied to Ubuntu 6.06 LTS, 8.04 LTS, 9.10, and 10.04 LTS. (CVE-2010-2023)

Dan Rosenberg discovered that Exim incorrectly handled MBX locking. If Exim were configured in this manner, a local user could use this flaw to cause a denial of service or possibly gain privileges. This issue only applied to Ubuntu 6.06 LTS, 8.04 LTS, 9.10, and 10.04 LTS. (CVE-2010-2024)

Original Source

Url : http://www.ubuntu.com/usn/USN-1060-1

CWE : Common Weakness Enumeration

% Id Name
40 % CWE-362 Race Condition
20 % CWE-264 Permissions, Privileges, and Access Controls
20 % CWE-59 Improper Link Resolution Before File Access ('Link Following')
20 % CWE-20 Improper Input Validation

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:12692
 
Oval ID: oval:org.mitre.oval:def:12692
Title: DSA-2154-2 exim4 -- privilege escalation / regression
Description: The updated packages from DSA-2154-1 introduced a regression which prevented unprivileged users from using "exim4 -bf" to test filter configurations. This update fixes this problem. Please also read the information provided in DSA-2154-1 if you have not done so already.
Family: unix Class: patch
Reference(s): DSA-2154-2
CVE-2010-4345
CVE-2011-0017
Version: 5
Platform(s): Debian GNU/Linux 5.0
Product(s): exim4
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:12720
 
Oval ID: oval:org.mitre.oval:def:12720
Title: DSA-2131-1 exim4 -- arbitrary code execution
Description: Several vulnerabilities have been found in exim4 that allow a remote attacker to execute arbitrary code as root user. Exploits for these issues have been seen in the wild. This update fixes a memory corruption issue that allows a remote attacker to execute arbitrary code as the Debian-exim user. A fix for an additional issue that allows the Debian-exim user to obtain root privileges is currently being checked for compatibility issues. It is not yet included in this upgrade but will released soon in an update to this advisory. For the stable distribution, this problem has been fixed in version 4.69-9+lenny1. This advisory only contains the packages for the alpha, amd64, hppa, i386, ia64, powerpc, and s390 architectures. The packages for the arm, armel, mips, mipsel, and sparc architectures will be released as soon as they are built. For the testing distribution and the unstable distribution, this problem has been fixed in version 4.70-1. We strongly recommend that you upgrade your exim4 packages.
Family: unix Class: patch
Reference(s): DSA-2131-1
CVE-2010-4344
CVE-2010-4345
Version: 5
Platform(s): Debian GNU/Linux 5.0
Product(s): exim4
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:12931
 
Oval ID: oval:org.mitre.oval:def:12931
Title: DSA-2154-1 exim4 -- privilege escalation
Description: A design flaw in exim4 allowed the loal Debian-exim user to obtain root privileges by specifying an alternate configuration file using the -C option or by using the macro override facility. Unfortunately, fixing this vulnerability is not possible without some changes in exim4's behvaviour. If you use the -C or -D options or use the system filter facility, you should evaluate the changes carefully and adjust your configuration accordingly. The Debian default configuration is not affected by the changes. The detailed list of changes is described in the NEWS. Debian file in the packages. The relevant sections are also reproduced below. In addition to that, missing error handling for the setuid/setgid system calls allowed the Debian-exim user to cause root to append log data to arbitrary files.
Family: unix Class: patch
Reference(s): DSA-2154-1
CVE-2010-4345
CVE-2011-0017
Version: 5
Platform(s): Debian GNU/Linux 5.0
Product(s): exim4
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:13736
 
Oval ID: oval:org.mitre.oval:def:13736
Title: USN-1060-1 -- exim4 vulnerabilities
Description: It was discovered that Exim contained a design flaw in the way it processed alternate configuration files. An attacker that obtained privileges of the "Debian-exim" user could use an alternate configuration file to obtain root privileges. It was discovered that Exim incorrectly handled certain return values when handling logging. A local attacker could use this flaw to obtain root privileges. Dan Rosenberg discovered that Exim incorrectly handled writable sticky-bit mail directories. If Exim were configured in this manner, a local user could use this flaw to cause a denial of service or possibly gain privileges. This issue only applied to Ubuntu 6.06 LTS, 8.04 LTS, 9.10, and 10.04 LTS. Dan Rosenberg discovered that Exim incorrectly handled MBX locking. If Exim were configured in this manner, a local user could use this flaw to cause a denial of service or possibly gain privileges. This issue only applied to Ubuntu 6.06 LTS, 8.04 LTS, 9.10, and 10.04 LTS
Family: unix Class: patch
Reference(s): USN-1060-1
CVE-2010-4345
CVE-2011-0017
CVE-2010-2023
CVE-2010-2024
Version: 5
Platform(s): Ubuntu 8.04
Ubuntu 10.10
Ubuntu 10.04
Ubuntu 9.10
Ubuntu 6.06
Product(s): exim4
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:21735
 
Oval ID: oval:org.mitre.oval:def:21735
Title: RHSA-2011:0153: exim security update (Moderate)
Description: Exim 4.72 and earlier allows local users to gain privileges by leveraging the ability of the exim user account to specify an alternate configuration file with a directive that contains arbitrary commands, as demonstrated by the spool_directory directive.
Family: unix Class: patch
Reference(s): RHSA-2011:0153-01
CESA-2011:0153
CVE-2010-4345
Version: 4
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Product(s): exim
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22839
 
Oval ID: oval:org.mitre.oval:def:22839
Title: ELSA-2011:0153: exim security update (Moderate)
Description: Exim 4.72 and earlier allows local users to gain privileges by leveraging the ability of the exim user account to specify an alternate configuration file with a directive that contains arbitrary commands, as demonstrated by the spool_directory directive.
Family: unix Class: patch
Reference(s): ELSA-2011:0153-01
CVE-2010-4345
Version: 6
Platform(s): Oracle Linux 5
Product(s): exim
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 68

ExploitDB Exploits

id Description
2010-12-16 Exim4 <= 4.69 string_format Function Heap Buffer Overflow

OpenVAS Exploits

Date Description
2012-07-30 Name : CentOS Update for exim CESA-2011:0153 centos4 x86_64
File : nvt/gb_CESA-2011_0153_exim_centos4_x86_64.nasl
2012-07-30 Name : CentOS Update for exim CESA-2011:0153 centos5 x86_64
File : nvt/gb_CESA-2011_0153_exim_centos5_x86_64.nasl
2011-08-09 Name : CentOS Update for exim CESA-2011:0153 centos5 i386
File : nvt/gb_CESA-2011_0153_exim_centos5_i386.nasl
2011-05-23 Name : Fedora Update for exim FEDORA-2011-7047
File : nvt/gb_fedora_2011_7047_exim_fc14.nasl
2011-05-23 Name : Fedora Update for exim FEDORA-2011-7059
File : nvt/gb_fedora_2011_7059_exim_fc13.nasl
2011-04-19 Name : Fedora Update for exim FEDORA-2010-12375
File : nvt/gb_fedora_2010_12375_exim_fc14.nasl
2011-03-05 Name : exim -- local privilege escalation
File : nvt/freebsd_exim2.nasl
2011-02-11 Name : Ubuntu Update for exim4 vulnerabilities USN-1060-1
File : nvt/gb_ubuntu_USN_1060_1.nasl
2011-01-31 Name : CentOS Update for exim CESA-2011:0153 centos4 i386
File : nvt/gb_CESA-2011_0153_exim_centos4_i386.nasl
2011-01-24 Name : FreeBSD Ports: exim
File : nvt/freebsd_exim1.nasl
2011-01-21 Name : RedHat Update for exim RHSA-2011:0153-01
File : nvt/gb_RHSA-2011_0153-01_exim.nasl
2011-01-04 Name : SuSE Update for exim SUSE-SA:2010:059
File : nvt/gb_suse_2010_059.nasl
2010-06-11 Name : Fedora Update for exim FEDORA-2010-9506
File : nvt/gb_fedora_2010_9506_exim_fc12.nasl
2010-06-11 Name : Fedora Update for exim FEDORA-2010-9524
File : nvt/gb_fedora_2010_9524_exim_fc13.nasl
2010-06-03 Name : Exim < 4.72 RC2 Multiple Vulnerabilities
File : nvt/gb_exim_4_72.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
70696 Exim log.c open_log() Function Local Privilege Escalation

Exim contains a flaw that may allow an attacker to gain access to unauthorized privileges. The issue is triggered when the 'open_log()' function in 'log.c' fails to properly check the return values of the 'setuid()' and 'setgid()' functions, allowing a local attacker to use symlink attacks to cause root to append log data to arbitrary files, resulting in the attacker gaining root privileges.
69860 Exim exim User Account Configuration File Directive Local Privilege Escalation

Exim contains a flaw that may allow an attacker to gain access to unauthorized privileges. The issue is triggered when an attacker leverages the ability of an exim user account to specify an alternate configuration file with a directive that contains arbitrary commands, allowing a local attacker to gain root privileges.
65159 Exim transports/appendfile.c MBX Locking Race Condition Permission Modification

65158 Exim transports/appendfile.c Hardlink Handling Arbitrary File Overwrite

Nessus® Vulnerability Scanner

Date Description
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_3_exim-110207.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_3_exim-101211.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_3_exim-100720.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-2011-0153.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20110117_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_2_exim-110207.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
2011-05-05 Name : The remote openSUSE host is missing a security update.
File : suse_11_1_exim-101211.nasl - Type : ACT_GATHER_INFO
2011-04-13 Name : The remote Fedora host is missing a security update.
File : fedora_2010-12375.nasl - Type : ACT_GATHER_INFO
2011-02-14 Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_44ccfab0356411e08e810022190034c0.nasl - Type : ACT_GATHER_INFO
2011-02-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1060-1.nasl - Type : ACT_GATHER_INFO
2011-02-03 Name : The remote mail server is potentially affected by a local privilege escalatio...
File : exim_4_74.nasl - Type : ACT_GATHER_INFO
2011-01-31 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2154.nasl - Type : ACT_GATHER_INFO
2011-01-28 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2011-0153.nasl - Type : ACT_GATHER_INFO
2011-01-18 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2011-0153.nasl - Type : ACT_GATHER_INFO
2011-01-10 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_e4fcf020044711e0becc0022156e8794.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
2010-07-23 Name : The remote openSUSE host is missing a security update.
File : suse_11_1_exim-100720.nasl - Type : ACT_GATHER_INFO
2010-07-23 Name : The remote openSUSE host is missing a security update.
File : suse_11_2_exim-100720.nasl - Type : ACT_GATHER_INFO
2010-07-01 Name : The remote Fedora host is missing a security update.
File : fedora_2010-9524.nasl - Type : ACT_GATHER_INFO
2010-07-01 Name : The remote Fedora host is missing a security update.
File : fedora_2010-9506.nasl - Type : ACT_GATHER_INFO
2010-06-02 Name : The remote mail server is potentially affected by multiple vulnerabilities.
File : exim_4_72.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:58:16
  • Multiple Updates