Vulnerabilities > CVE-2012-3523 - Permissions, Privileges, and Access Controls vulnerability in ISC INN

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
isc
CWE-264
nessus

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.

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 familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201401-24.NASL
    descriptionThe 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 seen2020-06-01
    modified2020-06-02
    plugin id72079
    published2014-01-22
    reporterThis script is Copyright (C) 2014-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/72079
    titleGLSA-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 familyMandriva Local Security Checks
    NASL idMANDRIVA_MDVSA-2012-156.NASL
    descriptionA security issue was identified and fixed in ISC INN : The STARTTLS implementation in INN
    last seen2020-06-01
    modified2020-06-02
    plugin id62404
    published2012-10-03
    reporterThis script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/62404
    titleMandriva 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 familySuSE Local Security Checks
    NASL idSUSE_INN-8276.NASL
    descriptionA STARTTLS injection issue has been fixed in inn. CVE-2012-3523 has been assigned to this issue.
    last seen2020-06-05
    modified2012-09-12
    plugin id62061
    published2012-09-12
    reporterThis script is Copyright (C) 2012-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/62061
    titleSuSE 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 familyMisc.
    NASL idNNTP_STARTTLS_PLAINTEXT_INJECTION.NASL
    descriptionThe 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 seen2020-06-01
    modified2020-06-02
    plugin id53848
    published2011-05-09
    reporterThis script is Copyright (C) 2011-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/53848
    titleNNTP Service STARTTLS Plaintext Command Injection
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_A7975581EE2611E18BD80022156E8794.NASL
    descriptionINN 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 seen2020-06-01
    modified2020-06-02
    plugin id61676
    published2012-08-27
    reporterThis script is Copyright (C) 2012-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/61676
    titleFreeBSD : inn -- plaintext command injection into encrypted channel (a7975581-ee26-11e1-8bd8-0022156e8794)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2012-600.NASL
    description - fix starttls command injection issue (CVE-2012-3523), [bnc#776967] - handle /var/run on tmpfs. [bnc#778439]
    last seen2020-06-05
    modified2014-06-13
    plugin id74753
    published2014-06-13
    reporterThis script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/74753
    titleopenSUSE Security Update : inn (openSUSE-SU-2012:1171-1)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_11_INN-120905.NASL
    descriptionA STARTTLS injection issue has been fixed in inn. CVE-2012-3523 was assigned to this issue.
    last seen2020-06-05
    modified2013-01-25
    plugin id64159
    published2013-01-25
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/64159
    titleSuSE 11.2 Security Update : inn (SAT Patch Number 6774)