Vulnerabilities > CVE-2017-3163 - Path Traversal vulnerability in Apache Solr
Summary
When using the Index Replication feature, Apache Solr nodes can pull index files from a master/leader node using an HTTP API which accepts a file name. However, Solr before 5.5.4 and 6.x before 6.4.1 did not validate the file name, hence it was possible to craft a special request involving path traversal, leaving any file readable to the Solr server process exposed. Solr servers protected and restricted by firewall rules and/or authentication would not be at risk since only trusted clients and users would gain direct HTTP access.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Relative Path Traversal An attacker exploits a weakness in input validation on the target by supplying a specially constructed path utilizing dot and slash characters for the purpose of obtaining access to arbitrary files or resources. An attacker modifies a known path on the target in order to reach material that is not available through intended channels. These attacks normally involve adding additional path separators (/ or \) and/or dots (.), or encodings thereof, in various combinations in order to reach parent directories or entirely separate trees of the target's directory structure.
- Directory Traversal An attacker with access to file system resources, either directly or via application logic, will use various file path specification or navigation mechanisms such as ".." in path strings and absolute paths to extend their range of access to inappropriate areas of the file system. The attacker attempts to either explore the file system for recon purposes or access directories and files that are intended to be restricted from their access. Exploring the file system can be achieved through constructing paths presented to directory listing programs, such as "ls" and 'dir', or through specially crafted programs that attempt to explore the file system. The attacker engaging in this type of activity is searching for information that can be used later in a more exploitive attack. Access to restricted directories or files can be achieved through modification of path references utilized by system applications.
- File System Function Injection, Content Based An attack of this type exploits the host's trust in executing remote content including binary files. The files are poisoned with a malicious payload (targeting the file systems accessible by the target software) by the attacker and may be passed through standard channels such as via email, and standard web content like PDF and multimedia files. The attacker exploits known vulnerabilities or handling routines in the target processes. Vulnerabilities of this type have been found in a wide variety of commercial applications from Microsoft Office to Adobe Acrobat and Apple Safari web browser. When the attacker knows the standard handling routines and can identify vulnerabilities and entry points they can be exploited by otherwise seemingly normal content. Once the attack is executed, the attackers' program can access relative directories such as C:\Program Files or other standard system directories to launch further attacks. In a worst case scenario, these programs are combined with other propagation logic and work as a virus.
- Using Slashes and URL Encoding Combined to Bypass Validation Logic This attack targets the encoding of the URL combined with the encoding of the slash characters. An attacker can take advantage of the multiple way of encoding an URL and abuse the interpretation of the URL. An URL may contain special character that need special syntax handling in order to be interpreted. Special characters are represented using a percentage character followed by two digits representing the octet code of the original character (%HEX-CODE). For instance US-ASCII space character would be represented with %20. This is often referred as escaped ending or percent-encoding. Since the server decodes the URL from the requests, it may restrict the access to some URL paths by validating and filtering out the URL requests it received. An attacker will try to craft an URL with a sequence of special characters which once interpreted by the server will be equivalent to a forbidden URL. It can be difficult to protect against this attack since the URL can contain other format of encoding such as UTF-8 encoding, Unicode-encoding, etc.
- Manipulating Input to File System Calls An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1046.NASL description lucene-solr handler supports an HTTP API (/replication?command=filecontent&file=<file_name>) which is vulnerable to path traversal attack. Specifically, this API does not perform any validation of the user specified file_name parameter. This can allow an attacker to download any file readable to Solr server process even if it is not related to the actual Solr index state. For Debian 7 last seen 2020-03-17 modified 2017-07-31 plugin id 102044 published 2017-07-31 reporter This script is Copyright (C) 2017-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/102044 title Debian DLA-1046-1 : lucene-solr security update code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-1046-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(102044); script_version("3.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2017-3163"); script_name(english:"Debian DLA-1046-1 : lucene-solr 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: "lucene-solr handler supports an HTTP API (/replication?command=filecontent&file=<file_name>) which is vulnerable to path traversal attack. Specifically, this API does not perform any validation of the user specified file_name parameter. This can allow an attacker to download any file readable to Solr server process even if it is not related to the actual Solr index state. For Debian 7 'Wheezy', this problem has been fixed in version 3.6.0+dfsg-1+deb7u2. We recommend that you upgrade your lucene-solr 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/2017/07/msg00040.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/wheezy/lucene-solr" ); script_set_attribute(attribute:"solution", value:"Upgrade the affected packages."); 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:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblucene3-contrib-java"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblucene3-java"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblucene3-java-doc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsolr-java"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:solr-common"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:solr-jetty"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:solr-tomcat"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0"); script_set_attribute(attribute:"patch_publication_date", value:"2017/07/30"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/31"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2020 Tenable Network Security, Inc."); 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:"7.0", prefix:"liblucene3-contrib-java", reference:"3.6.0+dfsg-1+deb7u2")) flag++; if (deb_check(release:"7.0", prefix:"liblucene3-java", reference:"3.6.0+dfsg-1+deb7u2")) flag++; if (deb_check(release:"7.0", prefix:"liblucene3-java-doc", reference:"3.6.0+dfsg-1+deb7u2")) flag++; if (deb_check(release:"7.0", prefix:"libsolr-java", reference:"3.6.0+dfsg-1+deb7u2")) flag++; if (deb_check(release:"7.0", prefix:"solr-common", reference:"3.6.0+dfsg-1+deb7u2")) flag++; if (deb_check(release:"7.0", prefix:"solr-jetty", reference:"3.6.0+dfsg-1+deb7u2")) flag++; if (deb_check(release:"7.0", prefix:"solr-tomcat", reference:"3.6.0+dfsg-1+deb7u2")) 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 Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-1451.NASL description An update for jboss-ec2-eap is now available for Red Hat JBoss Enterprise Application Platform 6.4 for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. 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 jboss-ec2-eap packages provide scripts for Red Hat JBoss Enterprise Application Platform running on the Amazon Web Services (AWS) Elastic Compute Cloud (EC2). With this update, the jboss-ec2-eap package has been updated to ensure compatibility with Red Hat JBoss Enterprise Application Platform 6.4.19. Security Fix(es) : * jackson-databind: Unsafe deserialization due to incomplete black list (incomplete fix for CVE-2017-7525) (CVE-2017-15095) * jackson-databind: Unsafe deserialization due to incomplete black list (incomplete fix for CVE-2017-15095) (CVE-2017-17485) * slf4j: Deserialisation vulnerability in EventData constructor can allow for arbitrary code execution (CVE-2018-8088) * Apache ActiveMQ Artemis: Deserialization of untrusted input vulnerability (CVE-2016-4978) * solr: Directory traversal via Index Replication HTTP API (CVE-2017-3163) * tomcat: Incorrect handling of empty string URL in security constraints can lead to unintended exposure of resources (CVE-2018-1304) * jackson-databind: incomplete fix for CVE-2017-7525 permits unsafe serialization via c3p0 libraries (CVE-2018-7489) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Liao Xinxi (NSFOCUS) for reporting CVE-2017-15095; 0c0c0f from 360Guan Xing Shi Yan Shi for reporting CVE-2017-17485; and Chris McCown for reporting CVE-2018-8088. last seen 2020-06-01 modified 2020-06-02 plugin id 109838 published 2018-05-16 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/109838 title RHEL 6 : eap6-jboss-ec2-eap (RHSA-2018:1451) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Red Hat Security Advisory RHSA-2018:1451. The text # itself is copyright (C) Red Hat, Inc. # include("compat.inc"); if (description) { script_id(109838); script_version("1.7"); script_cvs_date("Date: 2019/10/24 15:35:44"); script_cve_id("CVE-2016-4978", "CVE-2017-15095", "CVE-2017-17485", "CVE-2017-3163", "CVE-2018-1304", "CVE-2018-7489", "CVE-2018-8088"); script_xref(name:"RHSA", value:"2018:1451"); script_name(english:"RHEL 6 : eap6-jboss-ec2-eap (RHSA-2018:1451)"); script_summary(english:"Checks the rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote Red Hat host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "An update for jboss-ec2-eap is now available for Red Hat JBoss Enterprise Application Platform 6.4 for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. 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 jboss-ec2-eap packages provide scripts for Red Hat JBoss Enterprise Application Platform running on the Amazon Web Services (AWS) Elastic Compute Cloud (EC2). With this update, the jboss-ec2-eap package has been updated to ensure compatibility with Red Hat JBoss Enterprise Application Platform 6.4.19. Security Fix(es) : * jackson-databind: Unsafe deserialization due to incomplete black list (incomplete fix for CVE-2017-7525) (CVE-2017-15095) * jackson-databind: Unsafe deserialization due to incomplete black list (incomplete fix for CVE-2017-15095) (CVE-2017-17485) * slf4j: Deserialisation vulnerability in EventData constructor can allow for arbitrary code execution (CVE-2018-8088) * Apache ActiveMQ Artemis: Deserialization of untrusted input vulnerability (CVE-2016-4978) * solr: Directory traversal via Index Replication HTTP API (CVE-2017-3163) * tomcat: Incorrect handling of empty string URL in security constraints can lead to unintended exposure of resources (CVE-2018-1304) * jackson-databind: incomplete fix for CVE-2017-7525 permits unsafe serialization via c3p0 libraries (CVE-2018-7489) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Liao Xinxi (NSFOCUS) for reporting CVE-2017-15095; 0c0c0f from 360Guan Xing Shi Yan Shi for reporting CVE-2017-17485; and Chris McCown for reporting CVE-2018-8088." ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/documentation/en-us/" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2018:1451" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2016-4978" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-3163" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-15095" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-17485" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-1304" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-7489" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-8088" ); script_set_attribute( attribute:"solution", value: "Update the affected jboss-ec2-eap and / or jboss-ec2-eap-samples packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:jboss-ec2-eap"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:jboss-ec2-eap-samples"); script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6"); script_set_attribute(attribute:"vuln_publication_date", value:"2016/09/27"); script_set_attribute(attribute:"patch_publication_date", value:"2018/05/14"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/16"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Red Hat Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("misc_func.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) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat"); os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat"); os_ver = os_ver[1]; if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.x", "Red Hat " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu); yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo"); if (!empty_or_null(yum_updateinfo)) { rhsa = "RHSA-2018:1451"; yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa); if (!empty_or_null(yum_report)) { security_report_v4( port : 0, severity : SECURITY_HOLE, extra : yum_report ); exit(0); } else { audit_message = "affected by Red Hat security advisory " + rhsa; audit(AUDIT_OS_NOT, audit_message); } } else { flag = 0; if (rpm_check(release:"RHEL6", reference:"jboss-ec2-eap-7.5.20-1.Final_redhat_1.ep6.el6")) flag++; if (rpm_check(release:"RHEL6", reference:"jboss-ec2-eap-samples-7.5.20-1.Final_redhat_1.ep6.el6")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, extra : rpm_report_get() + redhat_report_package_caveat() ); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "jboss-ec2-eap / jboss-ec2-eap-samples"); } }
NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-1449.NASL description An update is now available for Red Hat JBoss Enterprise Application Platform 6.4 for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. 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. Red Hat JBoss Enterprise Application Platform is a platform for Java applications based on the JBoss Application Server. This release of Red Hat JBoss Enterprise Application Platform 6.4.20 serves as a replacement for Red Hat JBoss Enterprise Application Platform 6.4.19, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Security Fix(es) : * jackson-databind: Unsafe deserialization due to incomplete black list (incomplete fix for CVE-2017-7525) (CVE-2017-15095) * jackson-databind: Unsafe deserialization due to incomplete black list (incomplete fix for CVE-2017-15095) (CVE-2017-17485) * slf4j: Deserialisation vulnerability in EventData constructor can allow for arbitrary code execution (CVE-2018-8088) * Apache ActiveMQ Artemis: Deserialization of untrusted input vulnerability (CVE-2016-4978) * solr: Directory traversal via Index Replication HTTP API (CVE-2017-3163) * tomcat: Incorrect handling of empty string URL in security constraints can lead to unintended exposure of resources (CVE-2018-1304) * jackson-databind: incomplete fix for CVE-2017-7525 permits unsafe serialization via c3p0 libraries (CVE-2018-7489) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Liao Xinxi (NSFOCUS) for reporting CVE-2017-15095; 0c0c0f from 360Guan Xing Shi Yan Shi for reporting CVE-2017-17485; and Chris McCown for reporting CVE-2018-8088. last seen 2020-06-01 modified 2020-06-02 plugin id 109906 published 2018-05-18 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/109906 title RHEL 6 : JBoss EAP (RHSA-2018:1449) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-1448.NASL description An update is now available for Red Hat JBoss Enterprise Application Platform 6.4 for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. 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. Red Hat JBoss Enterprise Application Platform is a platform for Java applications based on the JBoss Application Server. This release of Red Hat JBoss Enterprise Application Platform 6.4.20 serves as a replacement for Red Hat JBoss Enterprise Application Platform 6.4.19, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Security Fix(es) : * jackson-databind: Unsafe deserialization due to incomplete black list (incomplete fix for CVE-2017-7525) (CVE-2017-15095) * jackson-databind: Unsafe deserialization due to incomplete black list (incomplete fix for CVE-2017-15095) (CVE-2017-17485) * slf4j: Deserialisation vulnerability in EventData constructor can allow for arbitrary code execution (CVE-2018-8088) * Apache ActiveMQ Artemis: Deserialization of untrusted input vulnerability (CVE-2016-4978) * solr: Directory traversal via Index Replication HTTP API (CVE-2017-3163) * tomcat: Incorrect handling of empty string URL in security constraints can lead to unintended exposure of resources (CVE-2018-1304) * jackson-databind: incomplete fix for CVE-2017-7525 permits unsafe serialization via c3p0 libraries (CVE-2018-7489) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Liao Xinxi (NSFOCUS) for reporting CVE-2017-15095; 0c0c0f from 360Guan Xing Shi Yan Shi for reporting CVE-2017-17485; and Chris McCown for reporting CVE-2018-8088. last seen 2020-06-01 modified 2020-06-02 plugin id 109905 published 2018-05-18 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/109905 title RHEL 7 : JBoss EAP (RHSA-2018:1448) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4124.NASL description Two vulnerabilities have been found in Solr, a search server based on Lucene, which could result in the execution of arbitrary code or path traversal. last seen 2020-06-01 modified 2020-06-02 plugin id 107024 published 2018-02-28 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/107024 title Debian DSA-4124-1 : lucene-solr - security update
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References
- https://www.debian.org/security/2018/dsa-4124
- https://access.redhat.com/errata/RHSA-2018:1451
- https://access.redhat.com/errata/RHSA-2018:1450
- https://access.redhat.com/errata/RHSA-2018:1449
- https://access.redhat.com/errata/RHSA-2018:1448
- https://access.redhat.com/errata/RHSA-2018:1447
- https://lists.apache.org/thread.html/a6a33a186f293f9f9aecf3bd39c76252bfc49a79de4321dd2a53b488%40%3Csolr-user.lucene.apache.org%3E