Improper access control in Atlassian Crowd Server and Data Center

1) Improper access control

EUVDB-ID: #VU69412

Risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-43782

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected application.

The vulnerability exists due to a security misconfiguration. A remote attacker connecting from IP in the allow list to authenticate as the crowd application through bypassing a password check can access privileged endpoints in Crowd's REST API under the usermanagement path and compromise the affected application.

The vulnerability exists only under the following conditions:

• the vulnerability concerns only new installations of affected versions: if you upgraded from an earlier version, for example version 2.9.1, to version 3.0.0 or later, your instance is not affected.
• an IP address has been added to the Remote Address configuration of the crowd application (which is none by default in versions after 3.0.0)

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Crowd: 3.0 - 5.0.2

CPE2.3

• cpe:2.3:a:atlassian:crowd:3.0:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.1:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:3.1.2:*:*:*:*:*:*:*

External links

https://jira.atlassian.com/browse/CWD-5888

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.