#VU56790 Information Exposure Through Timing Discrepancy

Published: 2021-09-21

Vulnerability identifier: #VU56790

Vulnerability risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38153


Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Apache Kafka
Client/Desktop applications / Messaging software

Vendor: Apache Foundation


The vulnerability allows a local user to escalate privileges on the system.

the vulnerability exists due to some components in Apache Kafka use "Arrays.equals" to validate a password or key, which is vulnerable to timing attacks. A local user can abuse the "Arrays.equals" to brute force access credentials and escalate privileges on the system.

Install updates from vendor's website.

Vulnerable software versions

Apache Kafka: 2.0.0 - 2.8.0


External links

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

Latest bulletins with this vulnerability