4.3
MEDIUM
CVE-2024-21630
Zulip Misconfigured Multi-Use Invitation Privilege Escalation Vulnerability
Description

Zulip is an open-source team collaboration tool. A vulnerability in version 8.0 is similar to CVE-2023-32677, but applies to multi-use invitations, not single-use invitation links as in the prior CVE. Specifically, it applies when the installation has configured non-admins to be able to invite users and create multi-use invitations, and has also configured only admins to be able to invite users to streams. As in CVE-2023-32677, this does not let users invite new users to arbitrary streams, only to streams that the inviter can already see. Version 8.1 fixes this issue. As a workaround, administrators can limit sending of invitations down to users who also have the permission to add users to streams.

INFO

Published Date :

Jan. 25, 2024, 8:15 p.m.

Last Modified :

Jan. 31, 2024, 11:45 p.m.

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2024-21630 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Zulip zulip_server
References to Advisories, Solutions, and Tools

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-21630 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-21630 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jan. 31, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
    Changed Reference Type https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf No Types Assigned https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf Patch
    Changed Reference Type https://github.com/zulip/zulip/security/advisories/GHSA-87p9-wprh-7rm6 No Types Assigned https://github.com/zulip/zulip/security/advisories/GHSA-87p9-wprh-7rm6 Vendor Advisory
    Changed Reference Type https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc No Types Assigned https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc Vendor Advisory
    Changed Reference Type https://zulip.com/help/configure-who-can-invite-to-streams No Types Assigned https://zulip.com/help/configure-who-can-invite-to-streams Product
    Changed Reference Type https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations No Types Assigned https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations Product
    Added CPE Configuration OR *cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:* versions from (including) 1.9.0 up to (excluding) 6.2 *cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:* versions from (including) 8.0 up to (excluding) 8.1
  • CVE Received by [email protected]

    Jan. 25, 2024

    Action Type Old Value New Value
    Added Description Zulip is an open-source team collaboration tool. A vulnerability in version 8.0 is similar to CVE-2023-32677, but applies to multi-use invitations, not single-use invitation links as in the prior CVE. Specifically, it applies when the installation has configured non-admins to be able to invite users and create multi-use invitations, and has also configured only admins to be able to invite users to streams. As in CVE-2023-32677, this does not let users invite new users to arbitrary streams, only to streams that the inviter can already see. Version 8.1 fixes this issue. As a workaround, administrators can limit sending of invitations down to users who also have the permission to add users to streams.
    Added Reference GitHub, Inc. https://github.com/zulip/zulip/security/advisories/GHSA-87p9-wprh-7rm6 [No types assigned]
    Added Reference GitHub, Inc. https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc [No types assigned]
    Added Reference GitHub, Inc. https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf [No types assigned]
    Added Reference GitHub, Inc. https://zulip.com/help/configure-who-can-invite-to-streams [No types assigned]
    Added Reference GitHub, Inc. https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations [No types assigned]
    Added CWE GitHub, Inc. CWE-862
    Added CVSS V3.1 GitHub, Inc. AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-21630 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2024-21630 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.05 }} 0.01%

score

0.18640

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability