It was found that a specially crafted search query could lead to excessive CPU consumption in the do_search() function. An unauthenticated attacker could use this flaw to provoke a denial of service.(CVE-2018-14648)

Security Fix(es) :

  - 389-ds-base: Mishandled search requests in     servers/slapd/search.c:do_search() allows for denial of     service (CVE-2018-14648)

This update for 389-ds to version 1.4.0.26 fixes the following issues :

Security issues fixed :

CVE-2016-5416: Fixed an information disclosure where a anonymous user could read the default ACI (bsc#991201).

CVE-2018-1054: Fixed a denial of service via search filters in SetUnicodeStringFromUTF_8() (bsc#1083689).

CVE-2018-1089: Fixed a buffer overflow via large filter value (bsc#1092187).

CVE-2018-10871: Fixed an information disclosure in certain plugins leading to the disclosure of plaintext password to an privileged attackers (bsc#1099465).

CVE-2018-14638: Fixed a denial of service through a crash in delete_passwdPolicy () (bsc#1108674).

CVE-2018-14648: Fixed a denial of service caused by malformed values in search queries (bsc#1109609).

CVE-2018-10935: Fixed a denial of service related to ldapsearch with server side sort (bsc#1105606).

CVE-2019-3883: Fixed a denial of service caused by hanging LDAP requests over TLS (bsc#1132385).

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.

According to the version of the 389-ds-base packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - 389-ds-base: Mishandled search requests in     servers/slapd/search.c:do_search() allows for denial of     service (CVE-2018-14648)

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.

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has 389-ds-base packages installed that are affected by a vulnerability:

  - It was found that a specially crafted search query could     lead to excessive CPU consumption in the do_search()     function. An unauthenticated attacker could use this     flaw to provoke a denial of service. (CVE-2018-14648)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2018:3507 advisory.

  - 389-ds-base: Mishandled search requests in servers/slapd/search.c:do_search() allows for denial of service     (CVE-2018-14648)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - 389-ds-base: Password brute-force possible for locked account due to different return codes     (CVE-2017-7551)

  - 389-ds-base: CRYPT password hash with asterisk allows any bind attempt to succeed (CVE-2021-3652)

  - 389-ds-base before versions 1.4.0.10, 1.3.8.3 is vulnerable to a race condition 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)

  - 389-ds-base before versions 1.3.8.5, 1.4.0.12 is vulnerable to a Cleartext Storage of Sensitive     Information. By default, when the Replica and/or retroChangeLog plugins are enabled, 389-ds-base stores     passwords in plaintext format in their respective changelog files. An attacker with sufficiently high     privileges, such as root or Directory Manager, can query these files in order to retrieve plaintext     passwords. (CVE-2018-10871)

  - 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.
    (CVE-2018-14624)

  - A flaw was found in 389-ds-base before version 1.3.8.4-13. The process ns-slapd crashes in     delete_passwdPolicy function when persistent search connections are terminated unexpectedly leading to     remote denial of service. (CVE-2018-14638)

  - A flaw was found in 389 Directory Server. A specially crafted search query could lead to excessive CPU     consumption in the do_search() function. An unauthenticated attacker could use this flaw to provoke a     denial of service. (CVE-2018-14648)

  - A flaw was found in the 'deref' plugin of 389-ds-base where it could use the 'search' permission to     display attribute values. In some configurations, this could allow an authenticated attacker to view     private attributes, such as password hashes. (CVE-2019-14824)

  - In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited     by the worker for at most 'ioblocktimeout' seconds. However this timeout applies only for un-encrypted     requests. Connections using SSL/TLS are not taking this timeout into account during reads, and may hang     longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers,     resulting in a Denial of Service. (CVE-2019-3883)

  - When binding against a DN during authentication, the reply from 389-ds-base will be different whether the     DN exists or not. This can be used by an unauthenticated attacker to check the existence of an entry in     the LDAP database. (CVE-2020-35518)

  - When using a sync_repl client in 389-ds-base, an authenticated attacker can cause a NULL pointer     dereference using a specially crafted query, causing a crash. (CVE-2021-3514)

  - A vulnerability was discovered in the 389 Directory Server that allows an unauthenticated attacker with     network access to the LDAP port to cause a denial of service. The denial of service is triggered by a     single message sent over a TCP connection, no bind or other authentication is required. The message     triggers a segmentation fault that results in slapd crashing. (CVE-2022-0918)

  - A vulnerability was found in the 389 Directory Server that allows expired passwords to access the database     to cause improper authentication. (CVE-2022-0996)

  - An access control bypass vulnerability found in 389-ds-base. That mishandling of the filter that would     yield incorrect results, but as that has progressed, can be determined that it actually is an access     control bypass. This may allow any remote unauthenticated user to issue a filter that allows searching for     database items they do not have access to, including but not limited to potentially userPassword hashes     and other sensitive data. (CVE-2022-1949)

  - A flaw was found In 389-ds-base. When the Content Synchronization plugin is enabled, an authenticated user     can reach a NULL pointer dereference using a specially crafted query. This flaw allows an authenticated     attacker to cause a denial of service. This CVE is assigned against an incomplete fix of CVE-2021-3514.
    (CVE-2022-2850)

  - A heap overflow flaw was found in 389-ds-base. This issue leads to a denial of service when writing a     value larger than 256 chars in log_entry_attr. (CVE-2024-1062)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

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.

The following packages have been upgraded to a later upstream version:
389-ds-base (1.3.8.4). (BZ#1560653)

Security Fix(es) :

* 389-ds-base: Mishandled search requests in servers/slapd/search.c:do_search () allows for denial of service (CVE-2018-14648)

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.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.

From Red Hat Security Advisory 2018:3127 :

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.

The following packages have been upgraded to a later upstream version:
389-ds-base (1.3.8.4). (BZ#1560653)

Security Fix(es) :

* 389-ds-base: Mishandled search requests in servers/slapd/search.c:do_search () allows for denial of service (CVE-2018-14648)

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.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.

ID	Name	Product	Family	Published	Updated	Severity
118959	Amazon Linux 2 : 389-ds-base (ALAS-2018-1106)	Nessus	Amazon Linux Local Security Checks	11/15/2018	4/9/2021	high
119176	Scientific Linux Security Update : 389-ds-base on SL7.x x86_64 (20181030)	Nessus	Scientific Linux Local Security Checks	11/27/2018	7/8/2020	high
128021	SUSE SLED15 / SLES15 Security Update : 389-ds (SUSE-SU-2019:2155-1)	Nessus	SuSE Local Security Checks	8/20/2019	1/13/2021	high
119928	EulerOS 2.0 SP2 : 389-ds-base (EulerOS-SA-2018-1439)	Nessus	Huawei Local Security Checks	12/28/2018	1/6/2021	high
127256	NewStart CGSL CORE 5.04 / MAIN 5.04 : 389-ds-base Vulnerability (NS-SA-2019-0062)	Nessus	NewStart CGSL Local Security Checks	8/12/2019	1/14/2021	high
118792	RHEL 7 : 389-ds-base (RHSA-2018:3507)	Nessus	Red Hat Local Security Checks	11/7/2018	4/27/2024	high
196299	RHEL 6 : 389-ds-base (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	5/11/2024	5/11/2024	critical
118531	RHEL 7 : 389-ds-base (RHSA-2018:3127)	Nessus	Red Hat Local Security Checks	10/31/2018	2/1/2022	high
118774	Oracle Linux 7 : 389-ds-base (ELSA-2018-3127)	Nessus	Oracle Linux Local Security Checks	11/7/2018	4/14/2021	high
118994	CentOS 7 : 389-ds-base (CESA-2018:3127)	Nessus	CentOS Local Security Checks	11/16/2018	4/8/2021	high
119465	Amazon Linux AMI : 389-ds-base (ALAS-2018-1106)	Nessus	Amazon Linux Local Security Checks	12/7/2018	6/9/2020	high
119929	EulerOS 2.0 SP3 : 389-ds-base (EulerOS-SA-2018-1440)	Nessus	Huawei Local Security Checks	12/28/2018	1/6/2021	high

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