Crowd Data Center and Server update for jetty-io

1) Resource exhaustion

EUVDB-ID: #VU51876

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-2021-28165

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when processing large TLS frames. A remote attacker can send specially crafted data to the server, trigger CPU high load and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Crowd Data Center: 5.0 - 5.2.3

Crowd: 5.0 - 5.2.3

CPE2.3

• cpe:2.3:a:atlassian:crowd_data_center:5.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd_data_center:5.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd_data_center:5.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:5.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:5.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:atlassian:crowd:5.2.3:*:*:*:*:*:*:*

External links

https://jira.atlassian.com/browse/CWD-6257

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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