Vulnerabilities > CVE-2020-12243 - Uncontrolled Recursion vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- XML Nested Payloads Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By nesting XML data and causing this data to be continuously self-referential, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization. An attacker's goal is to leverage parser failure to his or her advantage. In most cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it may be possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.230.1].
- XML Oversized Payloads Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By supplying oversized payloads in input vectors that will be processed by the XML parser, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization, and potentially cause execution of arbitrary code. An attacker's goal is to leverage parser failure to his or her advantage. In many cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it is possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.231.1].
- Violating Implicit Assumptions Regarding XML Content (aka XML Denial of Service (XDoS)) XML Denial of Service (XDoS) can be applied to any technology that utilizes XML data. This is, of course, most distributed systems technology including Java, .Net, databases, and so on. XDoS is most closely associated with web services, SOAP, and Rest, because remote service requesters can post malicious XML payloads to the service provider designed to exhaust the service provider's memory, CPU, and/or disk space. The main weakness in XDoS is that the service provider generally must inspect, parse, and validate the XML messages to determine routing, workflow, security considerations, and so on. It is exactly these inspection, parsing, and validation routines that XDoS targets. There are three primary attack vectors that XDoS can navigate Target CPU through recursion: attacker creates a recursive payload and sends to service provider Target memory through jumbo payloads: service provider uses DOM to parse XML. DOM creates in memory representation of XML document, but when document is very large (for example, north of 1 Gb) service provider host may exhaust memory trying to build memory objects. XML Ping of death: attack service provider with numerous small files that clog the system. All of the above attacks exploit the loosely coupled nature of web services, where the service provider has little to no control over the service requester and any messages the service requester sends.
- XML Parser Attack Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. These adverse effects may include the parser crashing, consuming too much of a resource, executing too slowly, executing code supplied by an attacker, allowing usage of unintended system functionality, etc. An attacker's goal is to leverage parser failure to his or her advantage. In some cases it may be possible to jump from the data plane to the control plane via bad data being passed to an XML parser. [R.99.1]
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DLA-2199.NASL description A vulnerability was discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. LDAP search filters with nested boolean expressions can result in denial of service (slapd daemon crash). For Debian 8 last seen 2020-05-23 modified 2020-05-04 plugin id 136289 published 2020-05-04 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136289 title Debian DLA-2199-1 : openldap security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-2199-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(136289); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/22"); script_cve_id("CVE-2020-12243"); script_xref(name:"IAVB", value:"2020-B-0028"); script_name(english:"Debian DLA-2199-1 : openldap security update"); script_summary(english:"Checks dpkg output for the updated packages."); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security update." ); script_set_attribute( attribute:"description", value: "A vulnerability was discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. LDAP search filters with nested boolean expressions can result in denial of service (slapd daemon crash). For Debian 8 'Jessie', this problem has been fixed in version 2.4.40+dfsg-1+deb8u6. We recommend that you upgrade your openldap packages. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA 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://lists.debian.org/debian-lts-announce/2020/05/msg00001.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/openldap" ); script_set_attribute(attribute:"solution", value:"Upgrade the affected packages."); 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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ldap-utils"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldap-2.4-2"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldap-2.4-2-dbg"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldap2-dev"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:slapd"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:slapd-dbg"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:slapd-smbk5pwd"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/28"); script_set_attribute(attribute:"patch_publication_date", value:"2020/05/02"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/04"); script_set_attribute(attribute:"stig_severity", value:"I"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Debian Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l"); exit(0); } include("audit.inc"); include("debian_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian"); if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (deb_check(release:"8.0", prefix:"ldap-utils", reference:"2.4.40+dfsg-1+deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"libldap-2.4-2", reference:"2.4.40+dfsg-1+deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"libldap-2.4-2-dbg", reference:"2.4.40+dfsg-1+deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"libldap2-dev", reference:"2.4.40+dfsg-1+deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"slapd", reference:"2.4.40+dfsg-1+deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"slapd-dbg", reference:"2.4.40+dfsg-1+deb8u6")) flag++; if (deb_check(release:"8.0", prefix:"slapd-smbk5pwd", reference:"2.4.40+dfsg-1+deb8u6")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family SuSE Local Security Checks NASL id SUSE_SU-2020-1210-1.NASL description This update for openldap2 fixes the following issues : CVE-2020-12243: Fixed a denial of service related to recursive filters (bsc#1170771). CVE-2019-13565: Fixed an authentication bypass caused by incorrect authorization of another connection, granting excess connection rights (bsc#1143194). CVE-2019-13057: Fixed an issue with improper authorization with delegated database admin privileges (bsc#1143273). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-23 modified 2020-05-15 plugin id 136650 published 2020-05-15 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136650 title SUSE SLES12 Security Update : openldap2 (SUSE-SU-2020:1210-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from SUSE update advisory SUSE-SU-2020:1210-1. # The text itself is copyright (C) SUSE. # include("compat.inc"); if (description) { script_id(136650); script_version("1.3"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/22"); script_cve_id("CVE-2019-13057", "CVE-2019-13565", "CVE-2020-12243"); script_xref(name:"IAVB", value:"2020-B-0028"); script_name(english:"SUSE SLES12 Security Update : openldap2 (SUSE-SU-2020:1210-1)"); script_summary(english:"Checks rpm output for the updated packages."); script_set_attribute( attribute:"synopsis", value:"The remote SUSE host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "This update for openldap2 fixes the following issues : CVE-2020-12243: Fixed a denial of service related to recursive filters (bsc#1170771). CVE-2019-13565: Fixed an authentication bypass caused by incorrect authorization of another connection, granting excess connection rights (bsc#1143194). CVE-2019-13057: Fixed an issue with improper authorization with delegated database admin privileges (bsc#1143273). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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.suse.com/show_bug.cgi?id=1143194" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1143273" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1170771" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-13057/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-13565/" ); script_set_attribute( attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-12243/" ); # https://www.suse.com/support/update/announcement/2020/suse-su-20201210-1/ script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?cc14fc4d" ); script_set_attribute( attribute:"solution", value: "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'. Alternatively you can run the command listed for your product : SUSE Linux Enterprise Server for SAP 12-SP5 : zypper in -t patch SUSE-SLE-SAP-12-SP5-2020-1210=1 SUSE Linux Enterprise Server for SAP 12-SP4 : zypper in -t patch SUSE-SLE-SAP-12-SP4-2020-1210=1 SUSE Linux Enterprise Server for SAP 12-SP3 : zypper in -t patch SUSE-SLE-SAP-12-SP3-2020-1210=1 SUSE Linux Enterprise Server for SAP 12-SP2 : zypper in -t patch SUSE-SLE-SAP-12-SP2-2020-1210=1 SUSE Linux Enterprise Server for SAP 12-SP1 : zypper in -t patch SUSE-SLE-SAP-12-SP1-2020-1210=1 SUSE Linux Enterprise Server 12-SP1-LTSS : zypper in -t patch SUSE-SLE-SERVER-12-SP1-2020-1210=1 SUSE Linux Enterprise Module for Legacy Software 12 : zypper in -t patch SUSE-SLE-Module-Legacy-12-2020-1210=1" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:compat-libldap-2_3"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:compat-libldap-2_3-0-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libldap-2_4"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libldap-2_4-2"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libldap-2_4-2-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openldap2"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openldap2-back-meta"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openldap2-back-meta-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openldap2-client"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openldap2-client-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openldap2-client-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openldap2-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:openldap2-debugsource"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/26"); script_set_attribute(attribute:"patch_publication_date", value:"2020/05/07"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/15"); script_set_attribute(attribute:"stig_severity", value:"I"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); 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("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/SuSE/release"); if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE"); os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE"); os_ver = os_ver[1]; if (! preg(pattern:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES12", "SUSE " + os_ver); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu); sp = get_kb_item("Host/SuSE/patchlevel"); if (isnull(sp)) sp = "0"; if (os_ver == "SLES12" && (! preg(pattern:"^(0|1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP0/1", os_ver + " SP" + sp); flag = 0; if (rpm_check(release:"SLES12", sp:"1", reference:"libldap-2_4-2-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"libldap-2_4-2-debuginfo-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"openldap2-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"openldap2-back-meta-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"openldap2-back-meta-debuginfo-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"openldap2-client-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"openldap2-client-debuginfo-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"openldap2-client-debugsource-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"openldap2-debuginfo-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"openldap2-debugsource-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"libldap-2_4-2-32bit-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"1", reference:"libldap-2_4-2-debuginfo-32bit-2.4.41-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"0", reference:"compat-libldap-2_3-0-2.3.37-18.24.17.1")) flag++; if (rpm_check(release:"SLES12", sp:"0", reference:"compat-libldap-2_3-0-debuginfo-2.3.37-18.24.17.1")) 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, "openldap2"); }
NASL family Huawei Local Security Checks NASL id EULEROS_SA-2020-1612.NASL description According to the version of the openldap packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).(CVE-2020-12243) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-11 modified 2020-06-02 plugin id 137030 published 2020-06-02 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/137030 title EulerOS 2.0 SP5 : openldap (EulerOS-SA-2020-1612) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(137030); script_version("1.3"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/10"); script_cve_id( "CVE-2020-12243" ); script_xref(name:"IAVB", value:"2020-B-0028"); script_name(english:"EulerOS 2.0 SP5 : openldap (EulerOS-SA-2020-1612)"); script_summary(english:"Checks the rpm output for the updated package."); script_set_attribute(attribute:"synopsis", value: "The remote EulerOS host is missing a security update."); script_set_attribute(attribute:"description", value: "According to the version of the openldap packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).(CVE-2020-12243) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues."); # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2020-1612 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d2fd39d2"); script_set_attribute(attribute:"solution", value: "Update the affected openldap 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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-12243"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"patch_publication_date", value:"2020/06/02"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/02"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap-clients"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap-servers"); script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0"); script_set_attribute(attribute:"stig_severity", value:"I"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Huawei Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp"); script_exclude_keys("Host/EulerOS/uvp_version"); 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/EulerOS/release"); if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS"); if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0"); sp = get_kb_item("Host/EulerOS/sp"); if (isnull(sp) || sp !~ "^(5)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5"); uvp = get_kb_item("Host/EulerOS/uvp_version"); if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5", "EulerOS UVP " + uvp); if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu); flag = 0; pkgs = ["openldap-2.4.44-15.h10.eulerosv2r7", "openldap-clients-2.4.44-15.h10.eulerosv2r7", "openldap-devel-2.4.44-15.h10.eulerosv2r7", "openldap-servers-2.4.44-15.h10.eulerosv2r7"]; foreach (pkg in pkgs) if (rpm_check(release:"EulerOS-2.0", sp:"5", reference:pkg)) 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, "openldap"); }
NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-4352-1.NASL description It was discovered that OpenLDAP incorrectly handled certain queries. A remote attacker could possibly use this issue to cause OpenLDAP to consume resources, resulting in a denial of service. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-23 modified 2020-05-07 plugin id 136401 published 2020-05-07 reporter Ubuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136401 title Ubuntu 16.04 LTS / 18.04 LTS / 19.10 / 20.04 : openldap vulnerability (USN-4352-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Ubuntu Security Notice USN-4352-1. The text # itself is copyright (C) Canonical, Inc. See # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered # trademark of Canonical, Inc. # include("compat.inc"); if (description) { script_id(136401); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/22"); script_cve_id("CVE-2020-12243"); script_xref(name:"USN", value:"4352-1"); script_xref(name:"IAVB", value:"2020-B-0028"); script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 19.10 / 20.04 : openldap vulnerability (USN-4352-1)"); script_summary(english:"Checks dpkg output for updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Ubuntu host is missing a security-related patch." ); script_set_attribute( attribute:"description", value: "It was discovered that OpenLDAP incorrectly handled certain queries. A remote attacker could possibly use this issue to cause OpenLDAP to consume resources, resulting in a denial of service. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu 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://usn.ubuntu.com/4352-1/" ); script_set_attribute(attribute:"solution", value:"Update the affected slapd 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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:slapd"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.10"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/28"); script_set_attribute(attribute:"patch_publication_date", value:"2020/05/06"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/07"); script_set_attribute(attribute:"stig_severity", value:"I"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"Ubuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Ubuntu Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l"); exit(0); } include("audit.inc"); include("ubuntu.inc"); include("misc_func.inc"); if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/Ubuntu/release"); if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu"); release = chomp(release); if (! preg(pattern:"^(16\.04|18\.04|19\.10|20\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 18.04 / 19.10 / 20.04", "Ubuntu " + release); if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu); flag = 0; if (ubuntu_check(osver:"16.04", pkgname:"slapd", pkgver:"2.4.42+dfsg-2ubuntu3.8")) flag++; if (ubuntu_check(osver:"18.04", pkgname:"slapd", pkgver:"2.4.45+dfsg-1ubuntu1.5")) flag++; if (ubuntu_check(osver:"19.10", pkgname:"slapd", pkgver:"2.4.48+dfsg-1ubuntu1.1")) flag++; if (ubuntu_check(osver:"20.04", pkgname:"slapd", pkgver:"2.4.49+dfsg-2ubuntu1.2")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_WARNING, extra : ubuntu_report_get() ); exit(0); } else { tested = ubuntu_pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "slapd"); }
NASL family SuSE Local Security Checks NASL id SUSE_SU-2020-1219-1.NASL description This update for openldap2 fixes the following issues : CVE-2020-12243: Fixed a denial of service related to recursive filters (bsc#1170771). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-23 modified 2020-05-15 plugin id 136655 published 2020-05-15 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136655 title SUSE SLED15 / SLES15 Security Update : openldap2 (SUSE-SU-2020:1219-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2020-1585.NASL description According to the version of the openldap packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).(CVE-2020-12243) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-31 modified 2020-05-26 plugin id 136863 published 2020-05-26 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136863 title EulerOS 2.0 SP8 : openldap (EulerOS-SA-2020-1585) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2020-2_0-0242_OPENLDAP.NASL description An update of the openldap package has been released. last seen 2020-05-23 modified 2020-05-13 plugin id 136571 published 2020-05-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136571 title Photon OS 2.0: Openldap PHSA-2020-2.0-0242 NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_C7617931898511EA93EFB42E99A1B9C3.NASL description Howard Chu reports : nested filters leads to stack overflow last seen 2020-05-23 modified 2020-04-29 plugin id 136070 published 2020-04-29 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136070 title FreeBSD : nested filters leads to stack overflow (c7617931-8985-11ea-93ef-b42e99a1b9c3) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2020-1_0-0293_OPENLDAP.NASL description An update of the openldap package has been released. last seen 2020-05-23 modified 2020-05-13 plugin id 136551 published 2020-05-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136551 title Photon OS 1.0: Openldap PHSA-2020-1.0-0293 NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2020-3_0-0089_OPENLDAP.NASL description An update of the openldap package has been released. last seen 2020-05-23 modified 2020-05-13 plugin id 136580 published 2020-05-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136580 title Photon OS 3.0: Openldap PHSA-2020-3.0-0089 NASL family SuSE Local Security Checks NASL id SUSE_SU-2020-1193-1.NASL description This update for openldap2 fixes the following issues : CVE-2020-12243: Fixed a denial of service related to recursive filters (bsc#1170771). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-05-23 modified 2020-05-11 plugin id 136466 published 2020-05-11 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136466 title SUSE SLES12 Security Update : openldap2 (SUSE-SU-2020:1193-1) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4666.NASL description A vulnerability was discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. LDAP search filters with nested boolean expressions can result in denial of service (slapd daemon crash). last seen 2020-05-23 modified 2020-04-30 plugin id 136123 published 2020-04-30 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136123 title Debian DSA-4666-1 : openldap - security update NASL family SuSE Local Security Checks NASL id OPENSUSE-2020-647.NASL description This update for openldap2 fixes the following issues : - CVE-2020-12243: Fixed a denial of service related to recursive filters (bsc#1170771). This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-05-23 modified 2020-05-12 plugin id 136489 published 2020-05-12 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136489 title openSUSE Security Update : openldap2 (openSUSE-2020-647)
References
- https://git.openldap.org/openldap/openldap/-/blob/OPENLDAP_REL_ENG_2_4/CHANGES
- https://bugs.openldap.org/show_bug.cgi?id=9202
- https://git.openldap.org/openldap/openldap/-/commit/98464c11df8247d6a11b52e294ba5dd4f0380440
- https://www.debian.org/security/2020/dsa-4666
- https://lists.debian.org/debian-lts-announce/2020/05/msg00001.html
- https://usn.ubuntu.com/4352-2/
- https://security.netapp.com/advisory/ntap-20200511-0003/
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00016.html
- https://usn.ubuntu.com/4352-1/
- https://support.apple.com/kb/HT211289
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/security-alerts/cpuapr2022.html