Denial of service in OpenLDAP

Published: 2017-05-31
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-9287
Exploitation vector Network
Public exploit N/A
Vulnerable software
Server applications / Directory software, identity management


Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Double free error


Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-9287

CWE-ID: CWE-415 - Double Free

Exploit availability: No


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

The vulnerability exists due to a double free error within servers/slapd/back-mdb/search.c when processing search requests, which include the Paged Results control with a page size of 0. A remote authenticated attacker can issue a directory search and crash the slapd daemon.

Successful exploitation of the vulnerability may allow a remote authenticated attacker to perform a denial of service (DoS) attack.


Update to version 2.4.45.

Vulnerable software versions

OpenLDAP: 1.0 - 2.4.44

External links;a=commit;h=0cee1ffb6021b1aae3fcc9581699da1c85a6dd6e

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

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.