Vulnerabilities > CVE-2018-14624 - Improper Input Validation vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
A vulnerability was discovered in 389-ds-base through versions 1.3.7.10, 1.3.8.8 and 1.4.0.16. The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(). An attacker could send a flood of modifications to a very large DN, which would cause slapd to crash.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Nessus
NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-2757.NASL description An update for 389-ds-base is now available for Red Hat Enterprise Linux 7. 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. 389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. Security Fix(es) : * 389-ds-base: race condition on reference counter leads to DoS using persistent search (CVE-2018-10850) * 389-ds-base: ldapsearch with server side sort allows users to cause a crash (CVE-2018-10935) * 389-ds-base: Server crash through modify command with large DN (CVE-2018-14624) * 389-ds-base: Crash in delete_passwdPolicy when persistent search connections are terminated unexpectedly (CVE-2018-14638) 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. The CVE-2018-10850 issue was discovered by Thierry Bordaz (Red Hat) and the CVE-2018-14638 issue was discovered by Viktor Ashirov (Red Hat). Bug Fix(es) : * Previously, the nucn-stans framework was enabled by default in Directory Server, but the framework is not stable. As a consequence, deadlocks and file descriptor leaks could occur. This update changes the default value of the nsslapd-enable-nunc-stans parameter to last seen 2020-06-01 modified 2020-06-02 plugin id 117774 published 2018-09-27 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/117774 title RHEL 7 : 389-ds-base (RHSA-2018:2757) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2018-1357.NASL description According to the versions of the 389-ds-base packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - race condition on reference counter leads to DoS using persistent search (CVE-2018-10850) - Server crash through modify command with large DN (CVE-2018-14624) 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 2020-05-06 modified 2018-11-06 plugin id 118740 published 2018-11-06 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/118740 title EulerOS 2.0 SP2 : 389-ds-base (EulerOS-SA-2018-1357) NASL family Scientific Linux Local Security Checks NASL id SL_20180925_389_DS_BASE_ON_SL7_X.NASL description Security Fix(es) : - 389-ds-base: race condition on reference counter leads to DoS using persistent search (CVE-2018-10850) - 389-ds-base: ldapsearch with server side sort allows users to cause a crash (CVE-2018-10935) - 389-ds-base: Server crash through modify command with large DN (CVE-2018-14624) - 389-ds-base: Crash in delete_passwdPolicy when persistent search connections are terminated unexpectedly (CVE-2018-14638) Bug Fix(es) : - Previously, the nucn-stans framework was enabled by default in Directory Server, but the framework is not stable. As a consequence, deadlocks and file descriptor leaks could occur. This update changes the default value of the nsslapd-enable-nunc-stans parameter to last seen 2020-03-18 modified 2018-09-27 plugin id 117785 published 2018-09-27 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/117785 title Scientific Linux Security Update : 389-ds-base on SL7.x x86_64 (20180925) NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2018-1094.NASL description A vulnerability was discovered in 389-ds-base. The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(). An attacker could send a flood of modifications to a very large DN, which would cause slapd to crash.(CVE-2018-14624) A race condition was found in the way 389-ds-base handles persistent search, resulting in a crash if the server is under load. An anonymous attacker could use this flaw to trigger a denial of service.(CVE-2018-10850) A double-free of a password policy structure was found in the way slapd was handling certain errors during persistent search. A unauthenticated attacker could use this flaw to crash Directory Server.(CVE-2018-14638) A flaw was found in the 389 Directory Server that allows users to cause a crash in the LDAP server using ldapsearch with server side sort.(CVE-2018-10935) last seen 2020-06-01 modified 2020-06-02 plugin id 118361 published 2018-10-25 reporter This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/118361 title Amazon Linux AMI : 389-ds-base (ALAS-2018-1094) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2018-2757.NASL description From Red Hat Security Advisory 2018:2757 : An update for 389-ds-base is now available for Red Hat Enterprise Linux 7. 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. 389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. Security Fix(es) : * 389-ds-base: race condition on reference counter leads to DoS using persistent search (CVE-2018-10850) * 389-ds-base: ldapsearch with server side sort allows users to cause a crash (CVE-2018-10935) * 389-ds-base: Server crash through modify command with large DN (CVE-2018-14624) * 389-ds-base: Crash in delete_passwdPolicy when persistent search connections are terminated unexpectedly (CVE-2018-14638) 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. The CVE-2018-10850 issue was discovered by Thierry Bordaz (Red Hat) and the CVE-2018-14638 issue was discovered by Viktor Ashirov (Red Hat). Bug Fix(es) : * Previously, the nucn-stans framework was enabled by default in Directory Server, but the framework is not stable. As a consequence, deadlocks and file descriptor leaks could occur. This update changes the default value of the nsslapd-enable-nunc-stans parameter to last seen 2020-06-01 modified 2020-06-02 plugin id 117766 published 2018-09-27 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/117766 title Oracle Linux 7 : 389-ds-base (ELSA-2018-2757) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1397.NASL description This update for 389-ds fixes the following issues : The following security vulnerabilities were addressed : - CVE-2018-10850: Fixed a race condition on reference counter that would lead to a denial of service using persistent search (bsc#1096368) - CVE-2017-15134: Fixed a remote denial of service via search filters in slapi_filter_sprintf in slapd/util.c (bsc#1076530) - CVE-2017-15135: Fixed authentication bypass due to lack of size check in slapi_ct_memcmp function in ch_malloc.c (bsc#1076530) - CVE-2018-10935: Fixed an issue that allowed users to cause a crash via ldapsearch with server side sorts (bsc#1105606) - CVE-2018-14624: The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(), allowing an attacker to send a flood of modifications to a very large DN, which could have caused slapd to crash (bsc#1106699). This update was imported from the SUSE:SLE-15:Update update project. last seen 2020-06-01 modified 2020-06-02 plugin id 125210 published 2019-05-16 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/125210 title openSUSE Security Update : 389-ds (openSUSE-2019-1397) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2018-1365.NASL description According to the versions of the 389-ds-base packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - race condition on reference counter leads to DoS using persistent search (CVE-2018-10850) - ldapsearch with server side sort allows users to cause a crash (CVE-2018-10935) - Server crash through modify command with large DN (CVE-2018-14624) - Crash in delete_passwdPolicy when persistent search connections are terminated unexpectedly (CVE-2018-14638) 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 2020-05-06 modified 2018-11-07 plugin id 118759 published 2018-11-07 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/118759 title EulerOS 2.0 SP3 : 389-ds-base (EulerOS-SA-2018-1365) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0038_389-DS-BASE.NASL description The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has 389-ds-base packages installed that are affected by multiple vulnerabilities: - A race condition was found in the way 389-ds-base handles persistent search, resulting in a crash if the server is under load. An anonymous attacker could use this flaw to trigger a denial of service. (CVE-2018-10850) - It was found that 389-ds-base did not properly handle long search filters with characters needing escapes, possibly leading to buffer overflows. A remote, unauthenticated attacker could potentially use this flaw to make ns-slapd crash via a specially crafted LDAP request, thus resulting in denial of service. (CVE-2018-1089) - A vulnerability was discovered in 389-ds-base. The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(). An attacker could send a flood of modifications to a very large DN, which would cause slapd to crash. (CVE-2018-14624) - A double-free of a password policy structure was found in the way slapd was handling certain errors during persistent search. A unauthenticated attacker could use this flaw to crash Directory Server. (CVE-2018-14638) - A flaw was found in the 389 Directory Server that allows users to cause a crash in the LDAP server using ldapsearch with server side sort. (CVE-2018-10935) 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 127210 published 2019-08-12 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127210 title NewStart CGSL CORE 5.04 / MAIN 5.04 : 389-ds-base Multiple Vulnerabilities (NS-SA-2019-0038) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-1207-1.NASL description This update for 389-ds fixes the following issues : The following security vulnerabilities were addressed : CVE-2018-10850: Fixed a race condition on reference counter that would lead to a denial of service using persistent search (bsc#1096368) CVE-2017-15134: Fixed a remote denial of service via search filters in slapi_filter_sprintf in slapd/util.c (bsc#1076530) CVE-2017-15135: Fixed authentication bypass due to lack of size check in slapi_ct_memcmp function in ch_malloc.c (bsc#1076530) CVE-2018-10935: Fixed an issue that allowed users to cause a crash via ldapsearch with server side sorts (bsc#1105606) CVE-2018-14624: The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(), allowing an attacker to send a flood of modifications to a very large DN, which could have caused slapd to crash (bsc#1106699). 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 124855 published 2019-05-13 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/124855 title SUSE SLED15 / SLES15 Security Update : 389-ds (SUSE-SU-2019:1207-1) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1526.NASL description It was discovered that the emergency logging system in 389-ds-base (the 389 Directory Server) is affected by a race condition caused by the invalidation of the concurrently used log file file descriptor without proper locking. This issue might be triggered by remote attackers to cause DoS (crash) and any other undefined behavior. For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 117836 published 2018-10-01 reporter This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/117836 title Debian DLA-1526-1 : 389-ds-base security update NASL family Amazon Linux Local Security Checks NASL id AL2_ALAS-2018-1094.NASL description A vulnerability was discovered in 389-ds-base. The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(). An attacker could send a flood of modifications to a very large DN, which would cause slapd to crash.(CVE-2018-14624) A race condition was found in the way 389-ds-base handles persistent search, resulting in a crash if the server is under load. An anonymous attacker could use this flaw to trigger a denial of service.(CVE-2018-10850) A double-free of a password policy structure was found in the way slapd was handling certain errors during persistent search. A unauthenticated attacker could use this flaw to crash Directory Server.(CVE-2018-14638) A flaw was found in the 389 Directory Server that allows users to cause a crash in the LDAP server using ldapsearch with server side sort.(CVE-2018-10935) last seen 2020-06-01 modified 2020-06-02 plugin id 118401 published 2018-10-26 reporter This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/118401 title Amazon Linux 2 : 389-ds-base (ALAS-2018-1094) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-1207-2.NASL description This update for 389-ds fixes the following issues : The following security vulnerabilities were addressed : CVE-2018-10850: Fixed a race condition on reference counter that would lead to a denial of service using persistent search (bsc#1096368) CVE-2017-15134: Fixed a remote denial of service via search filters in slapi_filter_sprintf in slapd/util.c (bsc#1076530) CVE-2017-15135: Fixed authentication bypass due to lack of size check in slapi_ct_memcmp function in ch_malloc.c (bsc#1076530) CVE-2018-10935: Fixed an issue that allowed users to cause a crash via ldapsearch with server side sorts (bsc#1105606) CVE-2018-14624: The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(), allowing an attacker to send a flood of modifications to a very large DN, which could have caused slapd to crash (bsc#1106699). 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 126439 published 2019-07-02 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/126439 title SUSE SLED15 / SLES15 Security Update : 389-ds (SUSE-SU-2019:1207-2) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2018-2757.NASL description An update for 389-ds-base is now available for Red Hat Enterprise Linux 7. 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. 389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. Security Fix(es) : * 389-ds-base: race condition on reference counter leads to DoS using persistent search (CVE-2018-10850) * 389-ds-base: ldapsearch with server side sort allows users to cause a crash (CVE-2018-10935) * 389-ds-base: Server crash through modify command with large DN (CVE-2018-14624) * 389-ds-base: Crash in delete_passwdPolicy when persistent search connections are terminated unexpectedly (CVE-2018-14638) 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. The CVE-2018-10850 issue was discovered by Thierry Bordaz (Red Hat) and the CVE-2018-14638 issue was discovered by Viktor Ashirov (Red Hat). Bug Fix(es) : * Previously, the nucn-stans framework was enabled by default in Directory Server, but the framework is not stable. As a consequence, deadlocks and file descriptor leaks could occur. This update changes the default value of the nsslapd-enable-nunc-stans parameter to last seen 2020-06-01 modified 2020-06-02 plugin id 117830 published 2018-10-01 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/117830 title CentOS 7 : 389-ds-base (CESA-2018:2757)
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