Vulnerabilities > CVE-2019-3824 - Out-of-bounds Read vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
A flaw was found in the way an LDAP search expression could crash the shared LDAP server process of a samba AD DC in samba before version 4.10. An authenticated user, having read permissions on the LDAP server, could use this flaw to cause denial of service.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Overread Buffers An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1699.NASL description Garming Sam reported an out-of-bounds read in the ldb_wildcard_compare() function of ldb, a LDAP-like embedded database, resulting in denial of service. For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 122515 published 2019-03-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122515 title Debian DLA-1699-1 : ldb security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-1699-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(122515); script_version("1.3"); script_cvs_date("Date: 2020/02/07"); script_cve_id("CVE-2019-3824"); script_name(english:"Debian DLA-1699-1 : ldb 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: "Garming Sam reported an out-of-bounds read in the ldb_wildcard_compare() function of ldb, a LDAP-like embedded database, resulting in denial of service. For Debian 8 'Jessie', this problem has been fixed in version 2:1.1.20-0+deb8u2. We recommend that you upgrade your ldb 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/2019/03/msg00000.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/ldb" ); script_set_attribute(attribute:"solution", value:"Upgrade the affected packages."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/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:ldb-tools"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldb-dev"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldb1"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldb1-dbg"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-ldb"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-ldb-dbg"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-ldb-dev"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/06"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/01"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/01"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 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:"ldb-tools", reference:"2:1.1.20-0+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"libldb-dev", reference:"2:1.1.20-0+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"libldb1", reference:"2:1.1.20-0+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"libldb1-dbg", reference:"2:1.1.20-0+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"python-ldb", reference:"2:1.1.20-0+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"python-ldb-dbg", reference:"2:1.1.20-0+deb8u2")) flag++; if (deb_check(release:"8.0", prefix:"python-ldb-dev", reference:"2:1.1.20-0+deb8u2")) 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 Debian Local Security Checks NASL id DEBIAN_DSA-4397.NASL description Garming Sam reported an out-of-bounds read in the ldb_wildcard_compare() function of ldb, a LDAP-like embedded database, resulting in denial of service. last seen 2020-06-01 modified 2020-06-02 plugin id 122516 published 2019-03-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122516 title Debian DSA-4397-1 : ldb - security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-4397. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(122516); script_version("1.3"); script_cvs_date("Date: 2020/02/07"); script_cve_id("CVE-2019-3824"); script_xref(name:"DSA", value:"4397"); script_name(english:"Debian DSA-4397-1 : ldb - security update"); script_summary(english:"Checks dpkg output for the updated package"); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security-related update." ); script_set_attribute( attribute:"description", value: "Garming Sam reported an out-of-bounds read in the ldb_wildcard_compare() function of ldb, a LDAP-like embedded database, resulting in denial of service." ); script_set_attribute( attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/ldb" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/stretch/ldb" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2019/dsa-4397" ); script_set_attribute( attribute:"solution", value: "Upgrade the ldb packages. For the stable distribution (stretch), this problem has been fixed in version 2:1.1.27-1+deb9u1." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/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:ldb"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/06"); script_set_attribute(attribute:"patch_publication_date", value:"2019/02/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/01"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 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:"9.0", prefix:"ldb-tools", reference:"2:1.1.27-1+deb9u1")) flag++; if (deb_check(release:"9.0", prefix:"libldb-dev", reference:"2:1.1.27-1+deb9u1")) flag++; if (deb_check(release:"9.0", prefix:"libldb1", reference:"2:1.1.27-1+deb9u1")) flag++; if (deb_check(release:"9.0", prefix:"python-ldb", reference:"2:1.1.27-1+deb9u1")) flag++; if (deb_check(release:"9.0", prefix:"python-ldb-dev", reference:"2:1.1.27-1+deb9u1")) 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 OPENSUSE-2019-1163.NASL description This update for ldb fixes the following issue : Security issue fixed : - CVE-2019-3824: Fixed an out-of-bound read vulnerability in ldb_wildcard_compare (bsc#1125410). This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 123818 published 2019-04-08 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123818 title openSUSE Security Update : ldb (openSUSE-2019-1163) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2019-1163. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(123818); script_version("1.2"); script_cvs_date("Date: 2020/01/23"); script_cve_id("CVE-2019-3824"); script_name(english:"openSUSE Security Update : ldb (openSUSE-2019-1163)"); script_summary(english:"Check for the openSUSE-2019-1163 patch"); script_set_attribute( attribute:"synopsis", value:"The remote openSUSE host is missing a security update." ); script_set_attribute( attribute:"description", value: "This update for ldb fixes the following issue : Security issue fixed : - CVE-2019-3824: Fixed an out-of-bound read vulnerability in ldb_wildcard_compare (bsc#1125410). This update was imported from the SUSE:SLE-15:Update update project." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1125410" ); script_set_attribute(attribute:"solution", value:"Update the affected ldb packages."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/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:novell:opensuse:ldb-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:ldb-tools"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:ldb-tools-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libldb-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libldb1"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libldb1-32bit"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libldb1-32bit-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libldb1-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python-ldb"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python-ldb-32bit"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python-ldb-32bit-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python-ldb-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python-ldb-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-ldb"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-ldb-32bit"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-ldb-32bit-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-ldb-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:python3-ldb-devel"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/06"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/05"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/08"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 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/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu"); 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, "openSUSE"); if (release !~ "^(SUSE15\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE15.0", reference:"ldb-debugsource-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"ldb-tools-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"ldb-tools-debuginfo-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"libldb-devel-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"libldb1-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"libldb1-debuginfo-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"python-ldb-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"python-ldb-debuginfo-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"python-ldb-devel-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"python3-ldb-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"python3-ldb-debuginfo-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", reference:"python3-ldb-devel-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libldb1-32bit-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libldb1-32bit-debuginfo-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"python-ldb-32bit-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"python-ldb-32bit-debuginfo-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"python3-ldb-32bit-1.2.3-lp150.7.2") ) flag++; if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"python3-ldb-32bit-debuginfo-1.2.3-lp150.7.2") ) 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, "ldb-debugsource / ldb-tools / ldb-tools-debuginfo / libldb-devel / etc"); }NASL family Misc. NASL id SAMBA_4_10_0_RC4.NASL description The version of Samba running on the remote host is 4.7.x, 4.8.x, 4.9.x < 4.9.5 or 4.10.0rc prior to 4.10.0rc4. It is, therefore, potentially affected by a denial of service (DoS) vulnerability in the LDAP search expression parser due to improper validation. An authenticated, remote attacker can exploit this issue, via a crafted LDAP search expression, to cause the LDAP server process of the Samba Active Directory Domain Controller to stop responding. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 122860 published 2019-03-15 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122860 title Samba 4.7.x / 4.8.x / 4.9.x < 4.9.5 / 4.10.0rc < 4.10.0rc4 LDAP Search Expression Denial of Service Vulnerability (CVE-2019-3824) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2020-1040.NASL description According to the versions of the samba packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - Samba from version 4.9.0 and before version 4.9.3 that have AD DC configurations watching for bad passwords (to restrict brute forcing of passwords) in a window of more than 3 minutes may not watch for bad passwords at all. The primary risk from this issue is with regards to domains that have been upgraded from Samba 4.8 and earlier. In these cases the manual testing done to confirm an organisation last seen 2020-06-01 modified 2020-06-02 plugin id 132794 published 2020-01-13 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132794 title EulerOS Virtualization for ARM 64 3.0.5.0 : samba (EulerOS-SA-2020-1040) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2020-1032.NASL description According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A flaw was found in samba last seen 2020-05-03 modified 2020-01-02 plugin id 132625 published 2020-01-02 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132625 title EulerOS 2.0 SP8 : samba (EulerOS-SA-2020-1032) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3895-1.NASL description It was discovered that LDB incorrectly handled certain search expressions. A remote attacker could possibly use this issue to cause the Samba LDAP process to crash, 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 2020-06-01 modified 2020-06-02 plugin id 122481 published 2019-02-27 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122481 title Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : ldb vulnerability (USN-3895-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0639-1.NASL description This update for ldb fixes the following issue : Security issue fixed : CVE-2019-3824: Fixed an out-of-bound read vulnerability in ldb_wildcard_compare (bsc#1125410). 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 2020-06-01 modified 2020-06-02 plugin id 122966 published 2019-03-20 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122966 title SUSE SLED15 / SLES15 Security Update : ldb (SUSE-SU-2019:0639-1)
References
- https://bugzilla.samba.org/show_bug.cgi?id=13773
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3824
- https://www.debian.org/security/2019/dsa-4397
- https://usn.ubuntu.com/3895-1/
- https://security.netapp.com/advisory/ntap-20190226-0001/
- https://lists.debian.org/debian-lts-announce/2019/03/msg00000.html
- http://www.securityfocus.com/bid/107347
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00035.html