Vulnerabilities > CVE-2012-3523 - Permissions, Privileges, and Access Controls vulnerability in ISC INN
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
The STARTTLS implementation in nnrpd in INN before 2.5.3 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.
Vulnerable Configurations
Part | Description | Count |
---|---|---|
Application | 17 |
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.
Nessus
NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201401-24.NASL description The remote host is affected by the vulnerability described in GLSA-201401-24 (INN: Man-in-the-middle attack) INN’s I/O buffering is not correctly restricted. Impact : A remote attacker could inject commands into encrypted NNTP sessions. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 72079 published 2014-01-22 reporter This script is Copyright (C) 2014-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/72079 title GLSA-201401-24 : INN: Man-in-the-middle attack code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Gentoo Linux Security Advisory GLSA 201401-24. # # The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc. # and licensed under the Creative Commons - Attribution / Share Alike # license. See http://creativecommons.org/licenses/by-sa/3.0/ # include("compat.inc"); if (description) { script_id(72079); script_version("1.5"); script_cvs_date("Date: 2018/12/05 20:31:22"); script_cve_id("CVE-2012-3523"); script_bugtraq_id(55146); script_xref(name:"GLSA", value:"201401-24"); script_name(english:"GLSA-201401-24 : INN: Man-in-the-middle attack"); script_summary(english:"Checks for updated package(s) in /var/db/pkg"); script_set_attribute( attribute:"synopsis", value: "The remote Gentoo host is missing one or more security-related patches." ); script_set_attribute( attribute:"description", value: "The remote host is affected by the vulnerability described in GLSA-201401-24 (INN: Man-in-the-middle attack) INN’s I/O buffering is not correctly restricted. Impact : A remote attacker could inject commands into encrypted NNTP sessions. Workaround : There is no known workaround at this time." ); script_set_attribute( attribute:"see_also", value:"https://security.gentoo.org/glsa/201401-24" ); script_set_attribute( attribute:"solution", value: "All INN users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=net-nntp/inn-2.5.3'" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:inn"); script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux"); script_set_attribute(attribute:"patch_publication_date", value:"2014/01/21"); script_set_attribute(attribute:"plugin_publication_date", value:"2014/01/22"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2014-2018 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Gentoo Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("qpkg.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo"); if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (qpkg_check(package:"net-nntp/inn", unaffected:make_list("ge 2.5.3"), vulnerable:make_list("lt 2.5.3"))) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get()); else security_warning(0); exit(0); } else { tested = qpkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "INN"); }
NASL family Mandriva Local Security Checks NASL id MANDRIVA_MDVSA-2012-156.NASL description A security issue was identified and fixed in ISC INN : The STARTTLS implementation in INN last seen 2020-06-01 modified 2020-06-02 plugin id 62404 published 2012-10-03 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/62404 title Mandriva Linux Security Advisory : inn (MDVSA-2012:156) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Mandriva Linux Security Advisory MDVSA-2012:156. # The text itself is copyright (C) Mandriva S.A. # include("compat.inc"); if (description) { script_id(62404); script_version("1.10"); script_cvs_date("Date: 2019/08/02 13:32:54"); script_cve_id("CVE-2012-3523"); script_bugtraq_id(55146); script_xref(name:"MDVSA", value:"2012:156"); script_name(english:"Mandriva Linux Security Advisory : inn (MDVSA-2012:156)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value: "The remote Mandriva Linux host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "A security issue was identified and fixed in ISC INN : The STARTTLS implementation in INN's NNTP server for readers, nnrpd, before 2.5.3 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted sessions by sending a cleartext command that is processed after TLS is in place, related to a plaintext command injection attack, a similar issue to CVE-2011-0411 (CVE-2012-3523). The updated packages have been upgraded to inn 2.5.3 which is not vulnerable to this issue." ); script_set_attribute( attribute:"see_also", value:"https://www.isc.org/software/inn/2.5.3article" ); script_set_attribute( attribute:"solution", value:"Update the affected inews, inn and / or inn-devel packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:inews"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:inn"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:inn-devel"); script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2011"); script_set_attribute(attribute:"patch_publication_date", value:"2012/10/02"); script_set_attribute(attribute:"plugin_publication_date", value:"2012/10/03"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Mandriva Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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); if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux"); if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu); flag = 0; if (rpm_check(release:"MDK2011", reference:"inews-2.5.3-0.1-mdv2011.0", yank:"mdv")) flag++; if (rpm_check(release:"MDK2011", reference:"inn-2.5.3-0.1-mdv2011.0", yank:"mdv")) flag++; if (rpm_check(release:"MDK2011", reference:"inn-devel-2.5.3-0.1-mdv2011.0", yank:"mdv")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family SuSE Local Security Checks NASL id SUSE_INN-8276.NASL description A STARTTLS injection issue has been fixed in inn. CVE-2012-3523 has been assigned to this issue. last seen 2020-06-05 modified 2012-09-12 plugin id 62061 published 2012-09-12 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/62061 title SuSE 10 Security Update : inn (ZYPP Patch Number 8276) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The text description of this plugin is (C) Novell, Inc. # include("compat.inc"); if (description) { script_id(62061); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2012-3523"); script_name(english:"SuSE 10 Security Update : inn (ZYPP Patch Number 8276)"); script_summary(english:"Checks rpm output for the updated package"); script_set_attribute( attribute:"synopsis", value:"The remote SuSE 10 host is missing a security-related patch." ); script_set_attribute( attribute:"description", value: "A STARTTLS injection issue has been fixed in inn. CVE-2012-3523 has been assigned to this issue." ); script_set_attribute( attribute:"see_also", value:"http://support.novell.com/security/cve/CVE-2012-3523.html" ); script_set_attribute(attribute:"solution", value:"Apply ZYPP patch number 8276."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:suse:suse_linux"); script_set_attribute(attribute:"patch_publication_date", value:"2012/09/05"); script_set_attribute(attribute:"plugin_publication_date", value:"2012/09/12"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2012-2020 Tenable Network Security, Inc."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list"); exit(0); } include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) exit(0, "Local checks are not enabled."); if (!get_kb_item("Host/SuSE/release")) exit(0, "The host is not running SuSE."); if (!get_kb_item("Host/SuSE/rpm-list")) exit(1, "Could not obtain the list of installed packages."); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) exit(1, "Failed to determine the architecture type."); if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") exit(1, "Local checks for SuSE 10 on the '"+cpu+"' architecture have not been implemented."); flag = 0; if (rpm_check(release:"SLES10", sp:4, reference:"inn-2.4.2-20.9.1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else exit(0, "The host is not affected.");
NASL family Misc. NASL id NNTP_STARTTLS_PLAINTEXT_INJECTION.NASL description The remote news server contains a software flaw in its STARTTLS implementation that could allow a remote, unauthenticated attacker to inject commands during the plaintext protocol phase that will be executed during the ciphertext protocol phase. Successful exploitation could allow an attacker access to private newsgroups and reveal a user last seen 2020-06-01 modified 2020-06-02 plugin id 53848 published 2011-05-09 reporter This script is Copyright (C) 2011-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/53848 title NNTP Service STARTTLS Plaintext Command Injection NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_A7975581EE2611E18BD80022156E8794.NASL description INN developers report : Fixed a possible plaintext command injection during the negotiation of a TLS layer. The vulnerability detailed in CVE-2011-0411 affects the STARTTLS and AUTHINFO SASL commands. nnrpd now resets its read buffer upon a successful negotiation of a TLS layer. It prevents malicious commands, sent unencrypted, from being executed in the new encrypted state of the session. last seen 2020-06-01 modified 2020-06-02 plugin id 61676 published 2012-08-27 reporter This script is Copyright (C) 2012-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/61676 title FreeBSD : inn -- plaintext command injection into encrypted channel (a7975581-ee26-11e1-8bd8-0022156e8794) NASL family SuSE Local Security Checks NASL id OPENSUSE-2012-600.NASL description - fix starttls command injection issue (CVE-2012-3523), [bnc#776967] - handle /var/run on tmpfs. [bnc#778439] last seen 2020-06-05 modified 2014-06-13 plugin id 74753 published 2014-06-13 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/74753 title openSUSE Security Update : inn (openSUSE-SU-2012:1171-1) NASL family SuSE Local Security Checks NASL id SUSE_11_INN-120905.NASL description A STARTTLS injection issue has been fixed in inn. CVE-2012-3523 was assigned to this issue. last seen 2020-06-05 modified 2013-01-25 plugin id 64159 published 2013-01-25 reporter This script is Copyright (C) 2013-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/64159 title SuSE 11.2 Security Update : inn (SAT Patch Number 6774)