Vulnerabilities > CVE-2018-14638 - Double Free vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
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 SuSE Local Security Checks NASL id SUSE_SU-2019-2155-1.NASL description 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. last seen 2020-06-01 modified 2020-06-02 plugin id 128021 published 2019-08-20 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/128021 title SUSE SLED15 / SLES15 Security Update : 389-ds (SUSE-SU-2019:2155-1) 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 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 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 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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References
- https://access.redhat.com/errata/RHSA-2018:2757
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14638
- https://pagure.io/389-ds-base/c/78fc627accacfa4061ce48977e22301f81ea8d73
- https://access.redhat.com/errata/RHSA-2018:2757
- https://pagure.io/389-ds-base/c/78fc627accacfa4061ce48977e22301f81ea8d73
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14638