Ubuntu update for OpenLDAP

Published: 2020-05-06

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2020-12243
CWE-ID	CWE-399
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	openldap (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource management error

EUVDB-ID: #VU27445

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12243

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to resource management error when performing searches with nested boolean expressions in filter.c within the slapd daemon in OpenLDAP. A remote attacker can send a specially crafted LDAP request to the affected server and crash the LDAP service.

Mitigation

Update the affected packages.

Ubuntu 20.04 LTS: slapd - 2.4.49+dfsg-2ubuntu1.2
Ubuntu 19.10: slapd - 2.4.48+dfsg-1ubuntu1.1
Ubuntu 18.04 LTS: slapd - 2.4.45+dfsg-1ubuntu1.5
Ubuntu 16.04 LTS: slapd - 2.4.42+dfsg-2ubuntu3.8

Vulnerable software versions

openldap (Ubuntu package): 2.4.42+dfsg-2ubuntu3.1 - 2.4.49+dfsg-2ubuntu1

External links

http://usn.ubuntu.com/4352-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.