NULL pointer dereference in OpenLDAP - CVE-2020-25692

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Main Vulnerability Database Vulnerabilities #VU48143

NULL pointer dereference in OpenLDAP - CVE-2020-25692

Published: November 4, 2020


Vulnerability identifier: #VU48143
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-25692
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in slapd normalization handling with modrdn. A remote non-authenticated attacker can send specially crafted packet to the slapd daemon and perform a denial of service (DoS) attack.


Affected software

OpenLDAP
MicroSCADA X SYS600
MicroSCADA Pro SYS600
Red Hat OpenShift GitOps
Migration Toolkit for Containers
Cloud Pak for Security (CP4S)
openldap (Debian package)
openldap (Alpine package)
openldap (Red Hat package)
slapd (Ubuntu package)
openldap
openldap-help
openldap-servers
openldap-debugsource
openldap-clients
openldap-devel
openldap-debuginfo
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Ubuntu
openEuler
Splunk Enterprise
IBM Security Guardium

How to mitigate CVE-2020-25692

Install updates from vendor's website.

OpenLDAP - update to 2.4.55
MicroSCADA X SYS600 - update to 10.4
MicroSCADA Pro SYS600 - update to 10.4
Migration Toolkit for Containers - update to 1.4.6
Cloud Pak for Security (CP4S) - update to 1.8.0.0
openldap (Debian package) - update to 2.4.47+dfsg-3+deb10u3
openldap (Alpine package) - update to 2.4.48-r2
openldap (Red Hat package) - update to 2.4.44-23.el7_9
Splunk Enterprise - addressed in versions 9.1.6, 9.2.3, 9.3.1
slapd (Ubuntu package) - addressed in versions 2.4.28-1.1ubuntu4.11, 2.4.31-1+nmu2ubuntu8.5+esm3, 2.4.42+dfsg-2ubuntu3.10, 2.4.45+dfsg-1ubuntu1.7, 2.4.49+dfsg-2ubuntu1.4, 2.4.53+dfsg-1ubuntu1.1
openldap - update to 2.4.50-2
openldap-help - update to 2.4.50-2
openldap-servers - update to 2.4.50-2
openldap-debugsource - update to 2.4.50-2
openldap-clients - update to 2.4.50-2
openldap-devel - update to 2.4.50-2
openldap-debuginfo - update to 2.4.50-2

External References

Related Security Bulletins