Red Hat Directory Server 11 update for the redhat-ds:11 module

Published: 2022-03-16

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-4091 CVE-2021-3514
CWE-ID	CWE-416 CWE-476
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Red Hat Directory Server Server applications / Directory software, identity management
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU60867

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-4091

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error when processing virtual attributes context in persistent searches. A remote user can send specially crafted search requests to the directory server, trigger a use-after-free error and crash the server.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Directory Server: 11

CPE2.3

cpe:2.3:a:red_hat:red_hat_directory_server:11:*:*:*:*:*:*:*

External links

https://access.redhat.com/errata/RHSA-2022:0952

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated 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) NULL pointer dereference

EUVDB-ID: #VU54107