Improper authorization in OpenLDAP

Published: 2019-07-30

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-13057 CVE-2019-13565
CWE-ID	CWE-285
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	OpenLDAP Server applications / Directory software, identity management
Vendor	OpenLDAP.org

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Authorization

EUVDB-ID: #VU19561

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-13057

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to incorrect processing of rootDN delegation in the OpenLDAP multi-tenant deployments. A database administrator could use this issue to request authorization as an identity from another database, contrary to expectations.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenLDAP: 2.4.3 - 2.4.47

External links

http://www.openldap.org/its/?findid=9038
http://www.openldap.org/lists/openldap-announce/201907/msg00001.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Improper Authorization

EUVDB-ID: #VU19562