SB2024020862 - Improper privilege management in Zulip Server
Published: February 8, 2024
Security Bulletin ID
SB2024020862
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Privilege Management (CVE-ID: CVE-2024-21630)
CWE-ID: CWE-269 - Improper Privilege Management
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to bypass implemented security restrictions.
The vulnerability exists due to improper privilege management when handling multi-use invitations. A remote user can bypass security restrictions and invite users to stream they should not be able to access otherwise.
Remediation
Install update from vendor's website.
References
- https://github.com/zulip/zulip/security/advisories/GHSA-87p9-wprh-7rm6
- https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc
- https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf
- https://zulip.com/help/configure-who-can-invite-to-streams
- https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations