CVE-2023-32677
Zulip Server Stream Privilege Escalation Vulnerability
Description
Zulip is an open-source team collaboration tool with unique topic-based threading. Zulip administrators can configure Zulip to limit who can add users to streams, and separately to limit who can invite users to the organization. In Zulip Server 6.1 and below, the UI which allows a user to invite a new user also allows them to set the streams that the new user is invited to -- even if the inviting user would not have permissions to add an existing user to streams. While such a configuration is likely rare in practice, the behavior does violate security-related controls. This does not let a user invite new users to streams they cannot see, or would not be able to add users to if they had that general permission. This issue has been addressed in version 6.2. Users are advised to upgrade. Users unable to upgrade may limit sending of invitations down to users who also have the permission to add users to streams.
INFO
Published Date :
May 19, 2023, 9:15 p.m.
Last Modified :
May 26, 2023, 5:28 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
1.6
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-32677.
| URL | Resource |
|---|---|
| https://github.com/zulip/zulip/commit/7c2693a2c64904d1d0af8503b57763943648cbe5 | Patch Third Party Advisory |
| https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc | Third Party Advisory |
| https://zulip.com/help/configure-who-can-invite-to-streams | Product |
| https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations | Product |
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-2023-32677 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-32677 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]
May. 26, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://github.com/zulip/zulip/commit/7c2693a2c64904d1d0af8503b57763943648cbe5 No Types Assigned https://github.com/zulip/zulip/commit/7c2693a2c64904d1d0af8503b57763943648cbe5 Patch, Third Party 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 Third Party 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 CWE NIST CWE-862 Added CPE Configuration OR *cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:* versions up to (excluding) 6.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-32677 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-2023-32677
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} 0.04%
score
0.45416
percentile