Denial of service in OpenLDAP

1) NULL pointer dereference

EUVDB-ID: #VU77252

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-2953

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error within the ber_memalloc_x() function. A remote attacker can send specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenLDAP: 2.3.4 - 2.5.13

CPE2.3

• cpe:2.3:a:openldap_org:openldap:2.3.4:*:*:*:*:*:*:*
• cpe:2.3:a:openldap_org:openldap:2.3.5:*:*:*:*:*:*:*
• cpe:2.3:a:openldap_org:openldap:2.3.6:*:*:*:*:*:*:*

External links

https://bugs.openldap.org/show_bug.cgi?id=9904
https://access.redhat.com/security/cve/CVE-2023-2953

Q & A

Can this vulnerability be exploited remotely?

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