Vulnerabilities > CVE-2013-1362 - Improper Input Validation vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Incomplete blacklist vulnerability in nrpc.c in Nagios Remote Plug-In Executor (NRPE) before 2.14 might allow remote attackers to execute arbitrary shell commands via "$()" shell metacharacters, which are processed by bash.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Exploit-Db
description | Nagios Remote Plugin Executor Arbitrary Command Execution. CVE-2013-1362. Remote exploit for linux platform |
file | exploits/linux/remote/24955.rb |
id | EDB-ID:24955 |
last seen | 2016-02-03 |
modified | 2013-04-12 |
platform | linux |
port | 5666 |
published | 2013-04-12 |
reporter | metasploit |
source | https://www.exploit-db.com/download/24955/ |
title | Nagios Remote Plugin Executor Arbitrary Command Execution |
type | remote |
Metasploit
description | The Nagios Remote Plugin Executor (NRPE) is installed to allow a central Nagios server to actively poll information from the hosts it monitors. NRPE has a configuration option dont_blame_nrpe which enables command-line arguments to be provided remote plugins. When this option is enabled, even when NRPE makes an effort to sanitize arguments to prevent command execution, it is possible to execute arbitrary commands. |
id | MSF:EXPLOIT/LINUX/MISC/NAGIOS_NRPE_ARGUMENTS |
last seen | 2020-05-07 |
modified | 2017-07-24 |
published | 2013-03-19 |
references | |
reporter | Rapid7 |
source | https://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/linux/misc/nagios_nrpe_arguments.rb |
title | Nagios Remote Plugin Executor Arbitrary Command Execution |
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2013-9829.NASL description Update to 2.14 upstream to fix security issue. Misc other bugfixes. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2013-07-12 plugin id 67386 published 2013-07-12 reporter This script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/67386 title Fedora 19 : nrpe-2.14-3.fc19 (2013-9829) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory 2013-9829. # include("compat.inc"); if (description) { script_id(67386); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2013-1362"); script_bugtraq_id(58142); script_xref(name:"FEDORA", value:"2013-9829"); script_name(english:"Fedora 19 : nrpe-2.14-3.fc19 (2013-9829)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "Update to 2.14 upstream to fix security issue. Misc other bugfixes. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=916947" ); # https://lists.fedoraproject.org/pipermail/package-announce/2013-June/108394.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?a8337f43" ); script_set_attribute(attribute:"solution", value:"Update the affected nrpe package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); 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:'Nagios Remote Plugin Executor Arbitrary Command Execution'); 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:fedoraproject:fedora:nrpe"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:19"); script_set_attribute(attribute:"patch_publication_date", value:"2013/06/01"); script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/12"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/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/RedHat/release"); if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora"); os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! ereg(pattern:"^19([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 19.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC19", reference:"nrpe-2.14-3.fc19")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "nrpe"); }
NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201408-18.NASL description The remote host is affected by the vulnerability described in GLSA-201408-18 (NRPE: Multiple Vulnerabilities) Multiple vulnerabilities have been discovered in NRPE. Please review the CVE identifiers referenced below for details. Impact : A remote attacker can utilize multiple vectors to execute arbitrary code. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 77462 published 2014-08-30 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/77462 title GLSA-201408-18 : NRPE: Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Gentoo Linux Security Advisory GLSA 201408-18. # # 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(77462); script_version("1.5"); script_cvs_date("Date: 2018/12/05 20:31:22"); script_cve_id("CVE-2013-1362", "CVE-2014-2913"); script_bugtraq_id(58142, 66969); script_xref(name:"GLSA", value:"201408-18"); script_name(english:"GLSA-201408-18 : NRPE: Multiple Vulnerabilities"); 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-201408-18 (NRPE: Multiple Vulnerabilities) Multiple vulnerabilities have been discovered in NRPE. Please review the CVE identifiers referenced below for details. Impact : A remote attacker can utilize multiple vectors to execute arbitrary code. Workaround : There is no known workaround at this time." ); script_set_attribute( attribute:"see_also", value:"https://security.gentoo.org/glsa/201408-18" ); script_set_attribute( attribute:"solution", value: "All NRPE users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=net-analyzer/nrpe-2.15'" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); 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:'Nagios Remote Plugin Executor Arbitrary Command Execution'); 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:gentoo:linux:nrpe"); script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux"); script_set_attribute(attribute:"patch_publication_date", value:"2014/08/30"); script_set_attribute(attribute:"plugin_publication_date", value:"2014/08/30"); 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-analyzer/nrpe", unaffected:make_list("ge 2.15"), vulnerable:make_list("lt 2.15"))) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get()); else security_hole(0); exit(0); } else { tested = qpkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "NRPE"); }
NASL family Fedora Local Security Checks NASL id FEDORA_2013-9836.NASL description Update to 2.14 upstream for security fix and misc other bugfixes. Fixes a mistake in the service file which prevented the NRPE daemon from being started Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2013-07-12 plugin id 67387 published 2013-07-12 reporter This script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/67387 title Fedora 17 : nrpe-2.14-3.fc17 (2013-9836) NASL family Misc. NASL id NAGIOS_NRPE_2_14.NASL description The remote host is running a version of Nagios NRPE that contains a flaw that is triggered when input passed via last seen 2020-06-01 modified 2020-06-02 plugin id 66361 published 2013-05-09 reporter This script is Copyright (C) 2013-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/66361 title Nagios NRPE nrpe.c Arbitrary Command Execution NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2013-203.NASL description Incomplete blacklist vulnerability in nrpc.c in Nagios Remote Plug-In Executor (NRPE) before 2.14 might allow remote attackers to execute arbitrary shell commands via last seen 2020-06-01 modified 2020-06-02 plugin id 69761 published 2013-09-04 reporter This script is Copyright (C) 2013-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/69761 title Amazon Linux AMI : nrpe (ALAS-2013-203) NASL family Fedora Local Security Checks NASL id FEDORA_2013-9848.NASL description Update to 2.14 upstream for security fix and misc other bugfixes. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2013-07-12 plugin id 67388 published 2013-07-12 reporter This script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/67388 title Fedora 18 : nrpe-2.14-3.fc18 (2013-9848) NASL family SuSE Local Security Checks NASL id SUSE_11_NAGIOS-NRPE-130710.NASL description Nagios NRPE was updated to add more blacklisting to avoid shell injection via nagios request packets. (CVE-2013-1362) last seen 2020-06-05 modified 2013-07-19 plugin id 68980 published 2013-07-19 reporter This script is Copyright (C) 2013-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/68980 title SuSE 11.2 / 11.3 Security Update : nagios-nrpe, nagios-plugins-nrpe (SAT Patch Numbers 8032 / 8033) NASL family SuSE Local Security Checks NASL id OPENSUSE-2013-301.NASL description NRPE (the Nagios Remote Plug-In Executor) allows the passing of $() to plugins/scripts which, if run under bash, will execute that shell command under a subprocess and pass the output as a parameter to the called script. Using this, it is possible to get called scripts, such as check_http, to execute arbitrary commands under the uid that NRPE/nagios is running as (typically, last seen 2020-06-05 modified 2014-06-13 plugin id 74957 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/74957 title openSUSE Security Update : nagios-nrpe (openSUSE-SU-2013:0621-1)
Packetstorm
data source https://packetstormsecurity.com/files/download/121287/nagios_nrpe_arguments.rb.txt id PACKETSTORM:121287 last seen 2016-12-05 published 2013-04-12 reporter Rudolph Pereir source https://packetstormsecurity.com/files/121287/Nagios-Remote-Plugin-Executor-Arbitrary-Command-Execution.html title Nagios Remote Plugin Executor Arbitrary Command Execution data source https://packetstormsecurity.com/files/download/120507/OSEC-2013-01.txt id PACKETSTORM:120507 last seen 2016-12-05 published 2013-02-22 reporter Rudolph Pereira source https://packetstormsecurity.com/files/120507/Nagios-NRPE-2.13-Code-Execution.html title Nagios NRPE 2.13 Code Execution
Saint
bid | 58142 |
description | Nagios Remote Plugin Executor Metacharacter Filtering Omission |
osvdb | 90582 |
title | nagios_nrpe_addon_metacharacter_filtering |
type | remote |
References
- http://lists.opensuse.org/opensuse-security-announce/2013-04/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2013-04/msg00006.html
- http://seclists.org/bugtraq/2013/Feb/119
- http://www.exploit-db.com/exploits/24955
- http://www.occamsec.com/vulnerabilities.html#nagios_metacharacter_vulnerability
- https://bugzilla.novell.com/show_bug.cgi?id=807241