CVE-2023-28623
"Zulip Unauthenticated Account Creation"
Description
Zulip is an open-source team collaboration tool with unique topic-based threading. In the event that 1: `ZulipLDAPAuthBackend` and an external authentication backend (any aside of `ZulipLDAPAuthBackend` and `EmailAuthBackend`) are the only ones enabled in `AUTHENTICATION_BACKENDS` in `/etc/zulip/settings.py` and 2: The organization permissions don't require invitations to join. An attacker can create a new account in the organization with an arbitrary email address in their control that's not in the organization's LDAP directory. The impact is limited to installations which have this specific combination of authentication backends as described above in addition to having `Invitations are required for joining this organization` organization permission disabled. This issue has been addressed in version 6.2. Users are advised to upgrade. Users unable to upgrade may enable the `Invitations are required for joining this organization` organization permission to prevent this issue.
INFO
Published Date :
May 19, 2023, 10:15 p.m.
Last Modified :
May 26, 2023, 5:25 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.2
Exploitability Score :
2.2
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-2023-28623.
| URL | Resource |
|---|---|
| https://github.com/zulip/zulip/commit/3df1b4dd7c210c21deb6f829df19412b74573f8d | Patch Third Party Advisory |
| https://github.com/zulip/zulip/security/advisories/GHSA-7p62-pjwg-56rv | Third Party Advisory |
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-2023-28623 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-28623 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.
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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:N/UI:N/S:U/C:N/I:L/A:N Changed Reference Type https://github.com/zulip/zulip/commit/3df1b4dd7c210c21deb6f829df19412b74573f8d No Types Assigned https://github.com/zulip/zulip/commit/3df1b4dd7c210c21deb6f829df19412b74573f8d Patch, Third Party Advisory Changed Reference Type https://github.com/zulip/zulip/security/advisories/GHSA-7p62-pjwg-56rv No Types Assigned https://github.com/zulip/zulip/security/advisories/GHSA-7p62-pjwg-56rv Third Party Advisory 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-2023-28623 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-2023-28623
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.01%
score
0.34050
percentile