Race condition in Zulip server

1) Race condition

EUVDB-ID: #VU61421

Risk: Medium

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

CVE-ID: CVE-2022-24751

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker can compromise the target system.

The vulnerability exists due to a race condition during user deactivation. A remote user can exploit the race and gain unauthorized access after being deactivated.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zulip Server: 4.0 - 4.10

External links

http://github.com/zulip/zulip/releases/tag/4.11

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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