Vulnerabilities > CVE-2011-1922 - Resource Management Errors vulnerability in Nlnetlabs Unbound
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
daemon/worker.c in Unbound 1.x before 1.4.10, when debugging functionality and the interface-automatic option are enabled, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DNS request that triggers improper error handling.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2011-7540.NASL description Denial of Service fix: CVE-2011-1922 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 2020-06-01 modified 2020-06-02 plugin id 54917 published 2011-05-31 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/54917 title Fedora 15 : unbound-1.4.8-5.fc15 (2011-7540) 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 2011-7540. # include("compat.inc"); if (description) { script_id(54917); script_version("1.12"); script_cvs_date("Date: 2019/08/02 13:32:35"); script_bugtraq_id(47986); script_xref(name:"FEDORA", value:"2011-7540"); script_name(english:"Fedora 15 : unbound-1.4.8-5.fc15 (2011-7540)"); 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: "Denial of Service fix: CVE-2011-1922 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." ); # https://lists.fedoraproject.org/pipermail/package-announce/2011-May/060958.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?7873fdf0" ); script_set_attribute( attribute:"solution", value:"Update the affected unbound package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:fedoraproject:fedora:unbound"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:15"); script_set_attribute(attribute:"patch_publication_date", value:"2011/05/26"); script_set_attribute(attribute:"plugin_publication_date", value:"2011/05/31"); 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:"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:"^15([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 15.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC15", reference:"unbound-1.4.8-5.fc15")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "unbound"); }
NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_DC96AC1F86B111E09E8500215AF774F0.NASL description Unbound developer reports : NLnet Labs was notified of an error in Unbound last seen 2020-06-01 modified 2020-06-02 plugin id 54825 published 2011-05-26 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/54825 title FreeBSD : Unbound -- an empty error packet handling assertion failure (dc96ac1f-86b1-11e0-9e85-00215af774f0) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from the FreeBSD VuXML database : # # Copyright 2003-2018 Jacques Vidrine and contributors # # Redistribution and use in source (VuXML) and 'compiled' forms (SGML, # HTML, PDF, PostScript, RTF and so forth) with or without modification, # are permitted provided that the following conditions are met: # 1. Redistributions of source code (VuXML) must retain the above # copyright notice, this list of conditions and the following # disclaimer as the first lines of this file unmodified. # 2. Redistributions in compiled form (transformed to other DTDs, # published online in any format, converted to PDF, PostScript, # RTF and other formats) must reproduce the above copyright # notice, this list of conditions and the following disclaimer # in the documentation and/or other materials provided with the # distribution. # # THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION, # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # include("compat.inc"); if (description) { script_id(54825); script_version("1.9"); script_cvs_date("Date: 2019/08/02 13:32:41"); script_cve_id("CVE-2011-1922"); script_name(english:"FreeBSD : Unbound -- an empty error packet handling assertion failure (dc96ac1f-86b1-11e0-9e85-00215af774f0)"); script_summary(english:"Checks for updated package in pkg_info output"); script_set_attribute( attribute:"synopsis", value:"The remote FreeBSD host is missing a security-related update." ); script_set_attribute( attribute:"description", value: "Unbound developer reports : NLnet Labs was notified of an error in Unbound's code-path for error replies which is triggered under special conditions. The error causes the program to abort." ); # http://unbound.nlnetlabs.nl/downloads/CVE-2011-1922.txt script_set_attribute( attribute:"see_also", value:"https://nlnetlabs.nl/downloads/unbound/CVE-2011-1922.txt" ); # https://vuxml.freebsd.org/freebsd/dc96ac1f-86b1-11e0-9e85-00215af774f0.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?930de562" ); script_set_attribute(attribute:"solution", value:"Update the affected package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:unbound"); script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd"); script_set_attribute(attribute:"vuln_publication_date", value:"2011/05/25"); script_set_attribute(attribute:"patch_publication_date", value:"2011/05/25"); script_set_attribute(attribute:"plugin_publication_date", value:"2011/05/26"); 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:"FreeBSD Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info"); exit(0); } include("audit.inc"); include("freebsd_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD"); if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (pkg_test(save_report:TRUE, pkg:"unbound<1.4.10")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family DNS NASL id UNBOUND_1_4_10.NASL description According to its self-reported version number, the remote Unbound DNS resolver is affected by a denial of service vulnerability due improper error handling. An unauthenticated, remote attacker can exploit this, via a specially crafted DNS request, to cause an assertion failure and a daemon exit, resulting in a denial of service condition. Note that this vulnerability only exists when debugging functionality is enabled (e.g. --enable-checking last seen 2020-06-01 modified 2020-06-02 plugin id 55049 published 2011-06-10 reporter This script is Copyright (C) 2011-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/55049 title Unbound < 1.4.10 daemon/worker.c DNS Request Error Handling DoS code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(55049); script_version("1.7"); script_cvs_date("Date: 2018/11/15 20:50:21"); script_cve_id("CVE-2011-1922"); script_bugtraq_id(47986); script_xref(name:"CERT", value:"531342"); script_name(english:"Unbound < 1.4.10 daemon/worker.c DNS Request Error Handling DoS"); script_summary(english:"Checks version of Unbound."); script_set_attribute(attribute:"synopsis", value: "The remote name server is affected by a denial of service vulnerability."); script_set_attribute(attribute:"description", value: "According to its self-reported version number, the remote Unbound DNS resolver is affected by a denial of service vulnerability due improper error handling. An unauthenticated, remote attacker can exploit this, via a specially crafted DNS request, to cause an assertion failure and a daemon exit, resulting in a denial of service condition. Note that this vulnerability only exists when debugging functionality is enabled (e.g. --enable-checking' or '--enable-debug') and the interface-automatic option is turned on. Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number."); script_set_attribute(attribute:"see_also", value:"http://unbound.nlnetlabs.nl/downloads/CVE-2011-1922.txt"); # https://nlnetlabs.nl/pipermail/unbound-users/2011-May/001846.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?99bf52e6"); script_set_attribute(attribute:"solution", value:"Upgrade to Unbound version 1.4.10 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/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:"vuln_publication_date", value:"2011/05/25"); script_set_attribute(attribute:"patch_publication_date", value:"2011/05/25"); script_set_attribute(attribute:"plugin_publication_date", value:"2011/06/10"); script_set_attribute(attribute:"potential_vulnerability", value:"true"); script_set_attribute(attribute:"cpe", value:"cpe:/a:unbound:unbound"); script_set_attribute(attribute:"plugin_type", value:"remote"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"DNS"); script_copyright(english:"This script is Copyright (C) 2011-2018 Tenable Network Security, Inc."); script_dependencies("unbound_version.nasl"); script_require_keys("unbound/version", "Settings/ParanoidReport"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("misc_func.inc"); version = get_kb_item_or_exit("unbound/version"); if (report_paranoia < 2) audit(AUDIT_PARANOID); fixed_version = "1.4.10"; port = 53; tcp = get_kb_item("DNS/tcp/53"); if (!isnull(tcp)) proto = "tcp"; else proto = "udp"; # default # if version < 1.4.10 if ( version =~ "^0\." || version =~ "^1\.[0-3]($|[^0-9])" || version =~ "^1\.4(\.([0-9])(\.[0-9]+)*)?(([abp]|rc)[0-9]*)?$" || version =~ "^1\.4\.10([ab]|rc)[0-9]*$" ) { if (report_verbosity > 0) { report = '\n Installed version : ' + version + '\n Fixed version : ' + fixed_version + '\n'; security_warning(port:port, proto:proto, extra:report); } else security_warning(port:port, proto:proto); exit(0); } else audit(AUDIT_LISTEN_NOT_VULN, 'Unbound', port, version);
NASL family Fedora Local Security Checks NASL id FEDORA_2011-7555.NASL description Denial of Service fix: CVE-2011-1922. 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 2020-06-01 modified 2020-06-02 plugin id 54978 published 2011-06-07 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/54978 title Fedora 14 : unbound-1.4.8-2.fc14 (2011-7555) 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 2011-7555. # include("compat.inc"); if (description) { script_id(54978); script_version("1.10"); script_cvs_date("Date: 2019/08/02 13:32:35"); script_cve_id("CVE-2011-1922"); script_bugtraq_id(47986); script_xref(name:"FEDORA", value:"2011-7555"); script_name(english:"Fedora 14 : unbound-1.4.8-2.fc14 (2011-7555)"); 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: "Denial of Service fix: CVE-2011-1922. 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." ); # https://lists.fedoraproject.org/pipermail/package-announce/2011-June/061243.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?2817214d" ); script_set_attribute( attribute:"solution", value:"Update the affected unbound package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/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:fedoraproject:fedora:unbound"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:14"); script_set_attribute(attribute:"patch_publication_date", value:"2011/05/26"); script_set_attribute(attribute:"plugin_publication_date", value:"2011/06/07"); 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:"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:"^14([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 14.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:"FC14", reference:"unbound-1.4.8-2.fc14")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "unbound"); }
NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201110-12.NASL description The remote host is affected by the vulnerability described in GLSA-201110-12 (Unbound: Denial of Service) Multiple vulnerabilities have been discovered in unbound. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could cause a Denial of Service. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 56524 published 2011-10-17 reporter This script is Copyright (C) 2011-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/56524 title GLSA-201110-12 : Unbound: Denial of Service
Seebug
bulletinFamily | exploit |
description | BUGTRAQ ID: 47986 CVE(CAN) ID: CVE-2011-1922 Unbound是开源的递归式DNS服务器软件。 Unbound DNS解析器在实现上存在远程拒绝服务漏洞,远程攻击者可利用此漏洞造成服务器崩溃,拒绝服务合法用户。 仅在Unbound用断言配置并开启选项interface-automatic时会触发此漏洞。 Unbound Unbound 1.4.9 Unbound Unbound 1.4.3 Unbound Unbound 1.4.2 Unbound Unbound 1.3.4 Unbound Unbound 1.3.3 厂商补丁: Unbound ------- 目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载: http://unbound.net/index.html |
id | SSV:20594 |
last seen | 2017-11-19 |
modified | 2011-06-02 |
published | 2011-06-02 |
reporter | Root |
title | Unbound DNS Resolver远程拒绝服务漏洞 |
References
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061243.html
- http://osvdb.org/72750
- http://secunia.com/advisories/44865
- http://unbound.nlnetlabs.nl/downloads/CVE-2011-1922.txt
- http://www.kb.cert.org/vuls/id/531342
- http://www.securityfocus.com/bid/47986
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67645