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CVE-2022-24751— Race condition in Zulip

Quick assessment

Affected
zulip zulip
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zulip是Zulip团队的一款功能强大的开源群聊应用程序。用于将实时聊天的即时性与线程对话的生产力优势相结合。 Zulip 4.0版本及4.11之前版本 存在竞争条件问题漏洞，该漏洞源于Zulip 在帐户停用期间容易受到竞争条件的影响。在极少数情况下，当被停用的用户同时访问时，是允许停用的用户继续访问的。

CVSS 5.4 · Medium EPSS 0.95% · P60

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2022-24751

Vulnerability Information
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Vulnerability Title
Race condition in Zulip
Source: CVE Program / CVE List V5
Vulnerability Description
Zulip is an open source group chat application. Starting with version 4.0 and prior to version 4.11, Zulip is vulnerable to a race condition during account deactivation, where a simultaneous access by the user being deactivated may, in rare cases, allow continued access by the deactivated user. A patch is available in version 4.11 on the 4.x branch and version 5.0-rc1 on the 5.x branch. Upgrading to a fixed version will, as a side effect, deactivate any cached sessions that may have been leaked through this bug. There are currently no known workarounds.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Zulip 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zulip是Zulip团队的一款功能强大的开源群聊应用程序。用于将实时聊天的即时性与线程对话的生产力优势相结合。 Zulip 4.0版本及4.11之前版本 存在竞争条件问题漏洞，该漏洞源于Zulip 在帐户停用期间容易受到竞争条件的影响。在极少数情况下，当被停用的用户同时访问时，是允许停用的用户继续访问的。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
zulip zulip >= 4.0, < 4.11 -

II. Public POCs for CVE-2022-24751

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III. Intelligence Information for CVE-2022-24751

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Patches & Fixes for CVE-2022-24751 (2)

Vendor Advisories for CVE-2022-24751 (1)

IV. Related Vulnerabilities

Same product: zulip
Same vendor: zulip
Same weakness: CWE-362

V. Comments for CVE-2022-24751

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