OpenLDAP up to 2.4.49 slapd filter.c Expression resource consumption

Summaryinfo

A vulnerability, which was classified as problematic, was found in OpenLDAP up to 2.4.49. The affected element is an unknown function of the file filter.c of the component slapd. Executing a manipulation as part of Expression can lead to resource consumption. The identification of this vulnerability is CVE-2020-12243. The attack may be launched remotely. There is no exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability has been found in OpenLDAP up to 2.4.49 (Directory Service Software) and classified as problematic. This vulnerability affects some unknown functionality of the file filter.c of the component slapd. The manipulation as part of a Expression leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).

The weakness was shared 04/28/2020 as confirmed git commit (GIT Repository). The advisory is available at git.openldap.org. This vulnerability was named CVE-2020-12243 since 04/24/2020. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 2.4.50 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.openldap.org. The best possible mitigation is suggested to be patching the affected component.

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Productinfo

Type

• Directory Service Software

Name

• OpenLDAP

Version

• 2.4.0
• 2.4.1
• 2.4.2
• 2.4.3
• 2.4.4
• 2.4.5
• 2.4.6
• 2.4.7
• 2.4.8
• 2.4.9
• 2.4.10
• 2.4.11
• 2.4.12
• 2.4.13
• 2.4.14
• 2.4.15
• 2.4.16
• 2.4.17
• 2.4.18
• 2.4.19
• 2.4.20
• 2.4.21
• 2.4.22
• 2.4.23
• 2.4.24
• 2.4.25
• 2.4.26
• 2.4.27
• 2.4.28
• 2.4.29
• 2.4.30
• 2.4.31
• 2.4.32
• 2.4.33
• 2.4.34
• 2.4.35
• 2.4.36
• 2.4.37
• 2.4.38
• 2.4.39
• 2.4.40
• 2.4.41
• 2.4.42
• 2.4.43
• 2.4.44
• 2.4.45
• 2.4.46
• 2.4.47
• 2.4.48
• 2.4.49

License

• open-source

CPE 2.3info

• 🔍
• 🔍
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CPE 2.2info

• 🔍
• 🔍
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