Vulnerabilities > CVE-2019-3822 - Out-of-bounds Write vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Nessus
NASL family Web Servers NASL id ORACLE_HTTP_SERVER_CPU_APR_2019.NASL description The version of Oracle HTTP Server installed on the remote host is affected by a stack-based buffer overflow as noted in the April 2019 CPU advisory. The condition exists in the included cURL library due to using unsigned math when preventing the overflow. An unauthenticated, remote attacker can exploit this, via a specially crafted HTTP request, to cause a denial of service condition or the execution of arbitrary code. last seen 2020-03-18 modified 2019-04-18 plugin id 124156 published 2019-04-18 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/124156 title Oracle Fusion Middleware Oracle HTTP Server (Apr 2019 CPU) NASL family Amazon Linux Local Security Checks NASL id AL2_ALAS-2019-1162.NASL description libcurl is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.(CVE-2018-16890) The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and resultant buffer overflow, and application crash) or possibly have unspecified other impact via vectors involving long user and password fields.(CVE-2017-8816) curl and libcurl before 7.57.0 on 32-bit platforms allow attackers to cause a denial of service (out-of-bounds access and application crash) or possibly have unspecified other impact because too little memory is allocated for interfacing to an SSL library.(CVE-2017-8818) libcurl may read outside of a heap allocated buffer when doing FTP. When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the `PWD` command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses. Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. When libcurl would then later access the string, it could read beyond the allocated heap buffer and crash or wrongly access data beyond the buffer, thinking it was part of the path. A malicious server could abuse this fact and effectively prevent libcurl-based clients to work with it - the PWD command is always issued on new FTP connections and the mistake has a high chance of causing a segfault. The simple fact that this has issue remained undiscovered for this long could suggest that malformed PWD responses are rare in benign servers. We are not aware of any exploit of this flaw. This bug was introduced in commit [415d2e7cb7](https://github.com/curl/curl/commit/415d2e7cb7), March 2005. In libcurl version 7.56.0, the parser always zero terminates the string but also rejects it if not terminated properly with a final double quote.(CVE-2017-1000254) Curl versions 7.14.1 through 7.61.1 are vulnerable to a heap-based buffer over-read in the tool_msgs.c:voutf() function that may result in information exposure and denial of service.(CVE-2018-16842) libcurl is vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large last seen 2020-06-01 modified 2020-06-02 plugin id 122260 published 2019-02-19 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/122260 title Amazon Linux 2 : curl (ALAS-2019-1162) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-174.NASL description This update for curl fixes the following issues : Security issues fixed : - CVE-2019-3823: Fixed a heap out-of-bounds read in the code handling the end-of-response for SMTP (bsc#1123378). - CVE-2019-3822: Fixed a stack based buffer overflow in the function creating an outgoing NTLM type-3 message (bsc#1123377). - CVE-2018-16890: Fixed a heap buffer out-of-bounds read in the function handling incoming NTLM type-2 messages (bsc#1123371). This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 122221 published 2019-02-15 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/122221 title openSUSE Security Update : curl (openSUSE-2019-174) NASL family Misc. NASL id ORACLE_ENTERPRISE_MANAGER_OPS_CENTER_JUL_2019_CPU.NASL description The version of Oracle Enterprise Manager Cloud Control installed on the remote host is affected by multiple vulnerabilities in Enterprise Manager Base Platform component: - An unspecified vulnerability in Networking (cURL) subcomponent of Oracle Enterprise Manager Ops Center, which could allow an unauthenticated attacker with network access to compromise Enterprise Manager Ops Center. (CVE-2019-3822) - An unspecified vulnerability in Networking (OpenSSL) subcomponent of Oracle Enterprise Manager Ops Center, which could allow an unauthenticated attacker with network access to compromise Enterprise Manager Ops Center. (CVE-2019-1559) - An unspecified vulnerability in Networking (OpenSSL) subcomponent of Oracle Enterprise Manager Ops Center, which could allow a low privileged attacker with network access to compromise Enterprise Manager Ops Center. (CVE-2019-2728) last seen 2020-06-01 modified 2020-06-02 plugin id 126777 published 2019-07-17 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126777 title Oracle Enterprise Manager Ops Center (Jul 2019 CPU) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-3701.NASL description An update for curl is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP. Security Fix(es) : * curl: NTLM type-2 heap out-of-bounds buffer read (CVE-2018-16890) * wget: Information exposure in set_file_metadata function in xattr.c (CVE-2018-20483) * curl: NTLMv2 type-3 header stack-based buffer overflow (CVE-2019-3822) * curl: SMTP end-of-response out-of-bounds read (CVE-2019-3823) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.1 Release Notes linked from the References section. last seen 2020-06-01 modified 2020-06-02 plugin id 130568 published 2019-11-06 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130568 title RHEL 8 : curl (RHSA-2019:3701) NASL family Slackware Local Security Checks NASL id SLACKWARE_SSA_2019-037-01.NASL description New curl packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues. last seen 2020-03-17 modified 2019-02-07 plugin id 121632 published 2019-02-07 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/121632 title Slackware 14.0 / 14.1 / 14.2 / current : curl (SSA:2019-037-01) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4386.NASL description Multiple vulnerabilities were discovered in cURL, an URL transfer library. - CVE-2018-16890 Wenxiang Qian of Tencent Blade Team discovered that the function handling incoming NTLM type-2 messages does not validate incoming data correctly and is subject to an integer overflow vulnerability, which could lead to an out-of-bounds buffer read. - CVE-2019-3822 Wenxiang Qian of Tencent Blade Team discovered that the function creating an outgoing NTLM type-3 header is subject to an integer overflow vulnerability, which could lead to an out-of-bounds write. - CVE-2019-3823 Brian Carpenter of Geeknik Labs discovered that the code handling the end-of-response for SMTP is subject to an out-of-bounds heap read. last seen 2020-03-17 modified 2019-02-07 plugin id 121628 published 2019-02-07 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/121628 title Debian DSA-4386-1 : curl - security update NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2019-1297.NASL description A stack-based buffer overflow vulnerability in the last seen 2020-06-01 modified 2020-06-02 plugin id 129567 published 2019-10-04 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/129567 title Amazon Linux AMI : mysql57 (ALAS-2019-1297) NASL family Databases NASL id MYSQL_8_0_16.NASL description The version of MySQL running on the remote host is 8.0.x prior to 8.0.16. It is, therefore, affected by multiple vulnerabilities, including four of the top vulnerabilities below, as noted in the April 2019 and July 2019 Critical Patch Update advisories: - An unspecified vulnerability in the last seen 2020-04-18 modified 2019-04-18 plugin id 124160 published 2019-04-18 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/124160 title MySQL 8.0.x < 8.0.16 Multiple Vulnerabilities (Apr 2019 CPU) (Jul 2019 CPU) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0248-1.NASL description This update for curl fixes the following issues : Security issues fixed : CVE-2019-3823: Fixed a heap out-of-bounds read in the code handling the end-of-response for SMTP (bsc#1123378). CVE-2019-3822: Fixed a stack-based buffer overflow in the function creating an outgoing NTLM type-3 message (bsc#1123377). CVE-2018-16890: Fixed a heap buffer out-of-bounds read in the function handling incoming NTLM type-2 messages (bsc#1123371). 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 2020-03-18 modified 2019-02-06 plugin id 121618 published 2019-02-06 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/121618 title SUSE SLED15 / SLES15 Security Update : curl (SUSE-SU-2019:0248-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0249-1.NASL description This update for curl fixes the following issues : Security issues fixed : CVE-2019-3823: Fixed a heap out-of-bounds read in the code handling the end-of-response for SMTP (bsc#1123378). CVE-2019-3822: Fixed a stack-based buffer overflow in the function creating an outgoing NTLM type-3 message (bsc#1123377). CVE-2018-16890: Fixed a heap buffer out-of-bounds read in the function handling incoming NTLM type-2 messages (bsc#1123371). 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 2020-03-18 modified 2019-02-07 plugin id 121635 published 2019-02-07 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/121635 title SUSE SLED12 / SLES12 Security Update : curl (SUSE-SU-2019:0249-1) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201903-03.NASL description The remote host is affected by the vulnerability described in GLSA-201903-03 (cURL: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in cURL. Please review the CVE identifiers referenced below for details. Impact : Remote attackers could cause a Denial of Service condition. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 122731 published 2019-03-11 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/122731 title GLSA-201903-03 : cURL: Multiple vulnerabilities NASL family Databases NASL id MYSQL_5_7_27_JULY.NASL description The version of MySQL running on the remote host is 5.7.x prior to 5.7.27. It is, therefore, affected by multiple vulnerabilities, including three of the top vulnerabilities below, as noted in the July 2019 Critical Patch Update advisory: - A stack-based buffer overflow vulnerability in the last seen 2020-04-18 modified 2019-07-18 plugin id 126783 published 2019-07-18 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/126783 title MySQL 5.7.x < 5.7.27 Multiple Vulnerabilities (Jul 2019 CPU) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-173.NASL description This update for curl fixes the following issues : Security issues fixed : - CVE-2019-3823: Fixed a heap out-of-bounds read in the code handling the end-of-response for SMTP (bsc#1123378). - CVE-2019-3822: Fixed a stack based buffer overflow in the function creating an outgoing NTLM type-3 message (bsc#1123377). - CVE-2018-16890: Fixed a heap buffer out-of-bounds read in the function handling incoming NTLM type-2 messages (bsc#1123371). This update was imported from the SUSE:SLE-12:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 122220 published 2019-02-15 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/122220 title openSUSE Security Update : curl (openSUSE-2019-173) NASL family PhotonOS Local Security Checks NASL id PHOTONOS_PHSA-2019-1_0-0209_CURL.NASL description An update of the curl package has been released. last seen 2020-06-01 modified 2020-06-02 plugin id 133296 published 2020-01-28 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133296 title Photon OS 1.0: Curl PHSA-2019-1.0-0209 NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_198E6220AC8B11E9A1C7B499BAEBFEAF.NASL description Oracle reports : This Critical Patch Update contains 45 new security fixes for Oracle MySQL. 4 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a network without requiring user credentials. last seen 2020-06-01 modified 2020-06-02 plugin id 126928 published 2019-07-23 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/126928 title FreeBSD : MySQL -- Multiple vulerabilities (198e6220-ac8b-11e9-a1c7-b499baebfeaf) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1672.NASL description It was discovered that there were three vulnerabilities in the curl command-line HTTP (etc.) client : - CVE-2018-16890: A heap buffer out-of-bounds read vulnerability in the handling of NTLM type-2 messages. - CVE-2019-3822: Stack-based buffer overflow in the handling of outgoing NTLM type-3 headers. - CVE-2019-3823: Heap out-of-bounds read in code handling the end of a response in the SMTP protocol. For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 122099 published 2019-02-12 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122099 title Debian DLA-1672-1 : curl security update NASL family Fedora Local Security Checks NASL id FEDORA_2019-43489941FF.NASL description - fix SMTP end-of-response out-of-bounds read (CVE-2019-3823) - fix NTLMv2 type-3 header stack-based buffer overflow (CVE-2019-3822) - fix NTLM type-2 out-of-bounds buffer read (CVE-2018-16890) Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. 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 122106 published 2019-02-12 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/122106 title Fedora 29 : curl (2019-43489941ff) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3882-1.NASL description Wenxiang Qian discovered that curl incorrectly handled certain NTLM authentication messages. A remote attacker could possibly use this issue to cause curl to crash, resulting in a denial of service. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 18.10. (CVE-2018-16890) Wenxiang Qian discovered that curl incorrectly handled certain NTLMv2 authentication messages. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 18.10. (CVE-2019-3822) Brian Carpenter discovered that curl incorrectly handled certain SMTP responses. A remote attacker could possibly use this issue to cause curl to crash, resulting in a denial of service. (CVE-2019-3823). 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 2020-03-18 modified 2019-02-07 plugin id 121639 published 2019-02-07 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/121639 title Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : curl vulnerabilities (USN-3882-1) NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_714B033A2B0911E98BC3610FD6E6CD05.NASL description curl security problems : CVE-2018-16890: NTLM type-2 out-of-bounds buffer read libcurl contains a heap buffer out-of-bounds read flaw. The function handling incoming NTLM type-2 messages (lib/vauth/ntlm.c:ntlm_decode_type2_target) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds. CVE-2019-3822: NTLMv2 type-3 header stack-based buffer overflow libcurl contains a stack based buffer overflow vulnerability. The function creating an outgoing NTLM type-3 header (lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large last seen 2020-06-01 modified 2020-06-02 plugin id 122042 published 2019-02-08 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/122042 title FreeBSD : curl -- multiple vulnerabilities (714b033a-2b09-11e9-8bc3-610fd6e6cd05) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0339-1.NASL description This update for curl fixes the following issues : Security issues fixed : CVE-2019-3822: Fixed a NTLMv2 type-3 header stack-based buffer overflow (bsc#1123377). CVE-2019-3823: Fixed an out-of-bounds read in the SMTP end-of-response (bsc#1123378). CVE-2018-16890: Fixed an out-of-bounds buffer read in NTLM type2 (bsc#1123371). CVE-2018-16842: Fixed an out-of-bounds read in tool_msgs.c (bsc#1113660). CVE-2018-16840: Fixed a use-after-free in handle close (bsc#1113029). CVE-2018-16839: Fixed an SASL password overflow caused by an integer overflow (bsc#1112758). 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 122149 published 2019-02-13 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/122149 title SUSE SLED12 / SLES12 Security Update : curl (SUSE-SU-2019:0339-1)
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References
- http://www.securityfocus.com/bid/106950
- http://www.securityfocus.com/bid/106950
- https://access.redhat.com/errata/RHSA-2019:3701
- https://access.redhat.com/errata/RHSA-2019:3701
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3822
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3822
- https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf
- https://curl.haxx.se/docs/CVE-2019-3822.html
- https://curl.haxx.se/docs/CVE-2019-3822.html
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://security.gentoo.org/glsa/201903-03
- https://security.gentoo.org/glsa/201903-03
- https://security.netapp.com/advisory/ntap-20190315-0001/
- https://security.netapp.com/advisory/ntap-20190315-0001/
- https://security.netapp.com/advisory/ntap-20190719-0004/
- https://security.netapp.com/advisory/ntap-20190719-0004/
- https://support.f5.com/csp/article/K84141449
- https://support.f5.com/csp/article/K84141449
- https://support.f5.com/csp/article/K84141449?utm_source=f5support&%3Butm_medium=RSS
- https://support.f5.com/csp/article/K84141449?utm_source=f5support&%3Butm_medium=RSS
- https://usn.ubuntu.com/3882-1/
- https://usn.ubuntu.com/3882-1/
- https://www.debian.org/security/2019/dsa-4386
- https://www.debian.org/security/2019/dsa-4386
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html