Vulnerabilities > CVE-2010-4345 - Permissions, Privileges, and Access Controls vulnerability in Exim
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN Summary
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.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
- Blue Boxing This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
- Restful Privilege Elevation Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
- Target Programs with Elevated Privileges This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
Exploit-Db
description | Exim4. CVE-2010-4344,CVE-2010-4345. Remote exploit for linux platform |
id | EDB-ID:16925 |
last seen | 2016-02-02 |
modified | 2010-12-16 |
published | 2010-12-16 |
reporter | metasploit |
source | https://www.exploit-db.com/download/16925/ |
title | Exim4 <= 4.69 - string_format Function Heap Buffer Overflow |
Metasploit
description | This module exploits a heap buffer overflow within versions of Exim prior to version 4.69. By sending a specially crafted message, an attacker can corrupt the heap and execute arbitrary code with the privileges of the Exim daemon. The root cause is that no check is made to ensure that the buffer is not full prior to handling '%s' format specifiers within the 'string_vformat' function. In order to trigger this issue, we get our message rejected by sending a message that is too large. This will call into log_write to log rejection headers (which is a default configuration setting). After filling the buffer, a long header string is sent. In a successful attempt, it overwrites the ACL for the 'MAIL FROM' command. By sending a second message, the string we sent will be evaluated with 'expand_string' and arbitrary shell commands can be executed. It is likely that this issue could also be exploited using other techniques such as targeting in-band heap management structures, or perhaps even function pointers stored in the heap. However, these techniques would likely be far more platform specific, more complicated, and less reliable. This bug was original found and reported in December 2008, but was not properly handled as a security issue. Therefore, there was a 2 year lag time between when the issue was fixed and when it was discovered being exploited in the wild. At that point, the issue was assigned a CVE and began being addressed by downstream vendors. An additional vulnerability, CVE-2010-4345, was also used in the attack that led to the discovery of danger of this bug. This bug allows a local user to gain root privileges from the Exim user account. If the Perl interpreter is found on the remote system, this module will automatically exploit the secondary bug as well to get root. |
id | MSF:EXPLOIT/UNIX/SMTP/EXIM4_STRING_FORMAT |
last seen | 2020-01-17 |
modified | 2018-09-15 |
published | 2010-12-11 |
references |
|
reporter | Rapid7 |
source | https://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/unix/smtp/exim4_string_format.rb |
title | Exim4 string_format Function Heap Buffer Overflow |
Nessus
NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2011-0153.NASL description Updated exim packages that fix one security issue are now available for Red Hat Enterprise Linux 4 and 5. The Red Hat Security Response Team has rated this update as having moderate 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 privilege escalation flaw was discovered in Exim. If an attacker were able to gain access to the last seen 2020-06-01 modified 2020-06-02 plugin id 51785 published 2011-01-28 reporter This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/51785 title CentOS 4 / 5 : exim (CESA-2011:0153) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Red Hat Security Advisory RHSA-2011:0153 and # CentOS Errata and Security Advisory 2011:0153 respectively. # include("compat.inc"); if (description) { script_id(51785); script_version("1.14"); script_cvs_date("Date: 2019/10/25 13:36:05"); script_cve_id("CVE-2010-4345"); script_bugtraq_id(45341); script_xref(name:"RHSA", value:"2011:0153"); script_name(english:"CentOS 4 / 5 : exim (CESA-2011:0153)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote CentOS 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. The Red Hat Security Response Team has rated this update as having moderate 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 privilege escalation flaw was discovered in Exim. If an attacker were able to gain access to the 'exim' user, they could cause Exim to execute arbitrary commands as the root user. (CVE-2010-4345) This update adds a new configuration file, '/etc/exim/trusted-configs'. To prevent Exim from running arbitrary commands as root, Exim will now drop privileges when run with a configuration file not listed as trusted. This could break backwards compatibility with some Exim configurations, as the trusted-configs file only trusts '/etc/exim/exim.conf' and '/etc/exim/exim4.conf' by default. If you are using a configuration file not listed in the new trusted-configs file, you will need to add it manually. Additionally, Exim will no longer allow a user to execute exim as root with the -D command line option to override macro definitions. All macro definitions that require root permissions must now reside in a trusted configuration file. Users of Exim are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, the exim daemon will be restarted automatically." ); # https://lists.centos.org/pipermail/centos-announce/2011-April/017338.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?1d0d8bfd" ); # https://lists.centos.org/pipermail/centos-announce/2011-April/017339.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?166cc0bc" ); # https://lists.centos.org/pipermail/centos-announce/2011-January/017243.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?87ec4edb" ); # https://lists.centos.org/pipermail/centos-announce/2011-January/017244.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?be520bee" ); script_set_attribute(attribute:"solution", value:"Update the affected exim 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:"metasploit_name", value:'Exim4 string_format Function Heap Buffer Overflow'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:exim"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:exim-doc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:exim-mon"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:exim-sa"); script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:4"); script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:5"); script_set_attribute(attribute:"vuln_publication_date", value:"2010/12/14"); script_set_attribute(attribute:"patch_publication_date", value:"2011/04/14"); script_set_attribute(attribute:"plugin_publication_date", value:"2011/01/28"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"CentOS Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/CentOS/release"); if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS"); os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS"); os_ver = os_ver[1]; if (! preg(pattern:"^(4|5)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 4.x / 5.x", "CentOS " + os_ver); if (!get_kb_item("Host/CentOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && "ia64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu); flag = 0; if (rpm_check(release:"CentOS-4", cpu:"i386", reference:"exim-4.43-1.RHEL4.5.el4_8.3")) flag++; if (rpm_check(release:"CentOS-4", cpu:"x86_64", reference:"exim-4.43-1.RHEL4.5.el4_8.3")) flag++; if (rpm_check(release:"CentOS-4", cpu:"i386", reference:"exim-doc-4.43-1.RHEL4.5.el4_8.3")) flag++; if (rpm_check(release:"CentOS-4", cpu:"x86_64", reference:"exim-doc-4.43-1.RHEL4.5.el4_8.3")) flag++; if (rpm_check(release:"CentOS-4", cpu:"i386", reference:"exim-mon-4.43-1.RHEL4.5.el4_8.3")) flag++; if (rpm_check(release:"CentOS-4", cpu:"x86_64", reference:"exim-mon-4.43-1.RHEL4.5.el4_8.3")) flag++; if (rpm_check(release:"CentOS-4", cpu:"i386", reference:"exim-sa-4.43-1.RHEL4.5.el4_8.3")) flag++; if (rpm_check(release:"CentOS-4", cpu:"x86_64", reference:"exim-sa-4.43-1.RHEL4.5.el4_8.3")) flag++; if (rpm_check(release:"CentOS-5", reference:"exim-4.63-5.el5_6.2")) flag++; if (rpm_check(release:"CentOS-5", reference:"exim-mon-4.63-5.el5_6.2")) flag++; if (rpm_check(release:"CentOS-5", reference:"exim-sa-4.63-5.el5_6.2")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_WARNING, extra : rpm_report_get() ); 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"); }
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-2154.NASL description A design flaw (CVE-2010-4345 ) in exim4 allowed the local Debian-exim user to obtain root privileges by specifying an alternate configuration file using the -C option or by using the macro override facility (-D option). Unfortunately, fixing this vulnerability is not possible without some changes in exim4 last seen 2020-03-17 modified 2011-01-31 plugin id 51819 published 2011-01-31 reporter This script is Copyright (C) 2011-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/51819 title Debian DSA-2154-1 : exim4 - privilege escalation NASL family SMTP problems NASL id EXIM_STRING_VFORMAT.NASL description A heap overflow vulnerability exists in the version of exim installed on the remote host. By sending a specially crafted message to the server, a remote attacker can leverage this vulnerability to execute arbitrary code on the server with the privilege of the exim server. A separate vulnerability that Nessus didn last seen 2020-06-01 modified 2020-06-02 plugin id 51179 published 2010-12-15 reporter This script is Copyright (C) 2010-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/51179 title Exim string_format Function Remote Overflow NASL family SuSE Local Security Checks NASL id SUSE_11_2_EXIM-101211.NASL description remote attackers could trick exim into running arbitrary code (CVE-2010-4344). A privilege escalation flaw allowed attackers to gain root access (CVE-2010-4345). last seen 2020-06-01 modified 2020-06-02 plugin id 53715 published 2011-05-05 reporter This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/53715 title openSUSE Security Update : exim (openSUSE-SU-2010:1052-1) NASL family SuSE Local Security Checks NASL id SUSE_11_1_EXIM-101211.NASL description remote attackers could trick exim into running arbitrary code (CVE-2010-4344). A privilege escalation flaw allowed attackers to gain root access (CVE-2010-4345). last seen 2020-06-01 modified 2020-06-02 plugin id 53657 published 2011-05-05 reporter This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/53657 title openSUSE Security Update : exim (openSUSE-SU-2010:1052-1) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-1060-1.NASL 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 last seen 2020-06-01 modified 2020-06-02 plugin id 51954 published 2011-02-11 reporter Ubuntu Security Notice (C) 2011-2019 Canonical, Inc. / NASL script (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/51954 title Ubuntu 6.06 LTS / 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : exim4 vulnerabilities (USN-1060-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2011-0153.NASL description Updated exim packages that fix one security issue are now available for Red Hat Enterprise Linux 4 and 5. The Red Hat Security Response Team has rated this update as having moderate 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 privilege escalation flaw was discovered in Exim. If an attacker were able to gain access to the last seen 2020-06-01 modified 2020-06-02 plugin id 51562 published 2011-01-18 reporter This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/51562 title RHEL 4 / 5 : exim (RHSA-2011:0153) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-2131.NASL 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 (CVE-2010-4344 ). A fix for an additional issue that allows the Debian-exim user to obtain root privileges (CVE-2010-4345 ) 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. last seen 2020-06-01 modified 2020-06-02 plugin id 51128 published 2010-12-12 reporter This script is Copyright (C) 2010-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/51128 title Debian DSA-2131-1 : exim4 - arbitrary code execution NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_E4FCF020044711E0BECC0022156E8794.NASL description David Woodhouse reports : Secondly a privilege escalation where the trusted last seen 2020-06-01 modified 2020-06-02 plugin id 51446 published 2011-01-10 reporter This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/51446 title FreeBSD : exim -- local privilege escalation (e4fcf020-0447-11e0-becc-0022156e8794) NASL family SuSE Local Security Checks NASL id SUSE_11_3_EXIM-101211.NASL description remote attackers could trick exim into running arbitrary code (CVE-2010-4344). A privilege escalation flaw allowed attackers to gain root access (CVE-2010-4345). last seen 2020-06-01 modified 2020-06-02 plugin id 75481 published 2014-06-13 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/75481 title openSUSE Security Update : exim (openSUSE-SU-2010:1052-1) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2011-0153.NASL description From Red Hat Security Advisory 2011:0153 : Updated exim packages that fix one security issue are now available for Red Hat Enterprise Linux 4 and 5. The Red Hat Security Response Team has rated this update as having moderate 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 privilege escalation flaw was discovered in Exim. If an attacker were able to gain access to the last seen 2020-06-01 modified 2020-06-02 plugin id 68180 published 2013-07-12 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/68180 title Oracle Linux 4 / 5 : exim (ELSA-2011-0153) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201401-32.NASL description The remote host is affected by the vulnerability described in GLSA-201401-32 (Exim: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Exim. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could possibly execute arbitrary code with root privileges, or cause a Denial of Service condition. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 72159 published 2014-01-28 reporter This script is Copyright (C) 2014-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/72159 title GLSA-201401-32 : Exim: Multiple vulnerabilities NASL family Scientific Linux Local Security Checks NASL id SL_20110117_EXIM_ON_SL4_X.NASL description A privilege escalation flaw was discovered in Exim. If an attacker were able to gain access to the last seen 2020-06-01 modified 2020-06-02 plugin id 60936 published 2012-08-01 reporter This script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/60936 title Scientific Linux Security Update : exim on SL4.x, SL5.x i386/x86_64
Packetstorm
data source | https://packetstormsecurity.com/files/download/96605/exim4_string_format.rb.txt |
id | PACKETSTORM:96605 |
last seen | 2016-12-05 |
published | 2010-12-11 |
reporter | H D Moore |
source | https://packetstormsecurity.com/files/96605/Exim4-4.69-string_format-Function-Heap-Buffer-Overflow.html |
title | Exim4 <= 4.69 string_format Function Heap Buffer Overflow |
Redhat
advisories |
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rpms |
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Seebug
bulletinFamily | exploit |
description | No description provided by source. |
id | SSV:71417 |
last seen | 2017-11-19 |
modified | 2014-07-01 |
published | 2014-07-01 |
reporter | Root |
source | https://www.seebug.org/vuldb/ssvid-71417 |
title | Exim4 <= 4.69 - string_format Function Heap Buffer Overflow |
References
- http://openwall.com/lists/oss-security/2010/12/10/1
- http://lists.exim.org/lurker/message/20101209.172233.abcba158.en.html
- https://bugzilla.redhat.com/show_bug.cgi?id=662012
- http://www.exim.org/lurker/message/20101207.215955.bb32d4f2.en.html
- http://www.theregister.co.uk/2010/12/11/exim_code_execution_peril/
- http://lists.exim.org/lurker/message/20101210.164935.385e04d0.en.html
- http://bugs.exim.org/show_bug.cgi?id=1044
- http://www.metasploit.com/modules/exploit/unix/smtp/exim4_string_format
- http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00003.html
- http://www.vupen.com/english/advisories/2010/3204
- http://www.kb.cert.org/vuls/id/758489
- http://www.vupen.com/english/advisories/2010/3171
- http://www.debian.org/security/2010/dsa-2131
- http://secunia.com/advisories/42576
- http://www.cpanel.net/2010/12/critical-exim-security-update.html
- http://www.securityfocus.com/bid/45341
- http://www.securitytracker.com/id?1024859
- http://www.vupen.com/english/advisories/2011/0135
- http://secunia.com/advisories/42930
- http://www.redhat.com/support/errata/RHSA-2011-0153.html
- http://www.vupen.com/english/advisories/2011/0245
- http://secunia.com/advisories/43128
- http://www.debian.org/security/2011/dsa-2154
- http://www.ubuntu.com/usn/USN-1060-1
- http://secunia.com/advisories/43243
- http://www.vupen.com/english/advisories/2011/0364
- http://www.securityfocus.com/archive/1/515172/100/0/threaded
- http://www.openwall.com/lists/oss-security/2021/05/04/7