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CVE-2022-41914— Non-constant-time SCIM token comparison in Zulip Server

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是美国Zulip公司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 5.0至5.6版本存在信息泄露漏洞，该漏洞源于其使用一个没有在固定时间运行的比较器检查SCIM承载令牌导致攻击者可以通过对大量失败的请求执行复杂的时间分析来推断令牌的值。如果成功，攻击者就可以模拟SCIM客户端来读取和更新Zulip组织中的用户帐户。

CVSS 3.7 · Low EPSS 0.56% · P44

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-41914

Vulnerability Information
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Vulnerability Title
Non-constant-time SCIM token comparison in Zulip Server
Source: CVE Program / CVE List V5
Vulnerability Description
Zulip is an open-source team collaboration tool. For organizations with System for Cross-domain Identity Management(SCIM) account management enabled, Zulip Server 5.0 through 5.6 checked the SCIM bearer token using a comparator that did not run in constant time. Therefore, it might theoretically be possible for an attacker to infer the value of the token by performing a sophisticated timing analysis on a large number of failing requests. If successful, this would allow the attacker to impersonate the SCIM client for its abilities to read and update user accounts in the Zulip organization. Organizations where SCIM account management has not been enabled are not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Zulip 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zulip是美国Zulip公司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 5.0至5.6版本存在信息泄露漏洞，该漏洞源于其使用一个没有在固定时间运行的比较器检查SCIM承载令牌导致攻击者可以通过对大量失败的请求执行复杂的时间分析来推断令牌的值。如果成功，攻击者就可以模拟SCIM客户端来读取和更新Zulip组织中的用户帐户。
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 >= 5.0, < 5.7 -

II. Public POCs for CVE-2022-41914

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III. Intelligence Information for CVE-2022-41914

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Patches & Fixes for CVE-2022-41914 (1)

Vendor Advisories for CVE-2022-41914 (1)

IV. Related Vulnerabilities

Same product: zulip
Same vendor: zulip
Same weakness: CWE-200

V. Comments for CVE-2022-41914

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