Zulip server before 2.0.5 incompletely validated the MIME types of uploaded files. A user who is logged into the server could upload files of certain types to mount a stored cross-site scripting attack on other logged-in users. On a Zulip server using the default local uploads backend, the attack is only effective against browsers lacking support for Content-Security-Policy such as Internet Explorer 11. On a Zulip server using the S3 uploads backend, the attack is confined to the origin of the configured S3 uploads hostname and cannot reach the Zulip server itself.
References
Link | Resource |
---|---|
https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/ | Vendor Advisory |
https://github.com/zulip/zulip/commit/1195841dfb9aa26b3b0dabc6f05d72e4af25be3e | Patch Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: mitre
Published: 2019-09-18T11:08:09
Updated: 2019-09-18T11:08:09
Reserved: 2019-09-11T00:00:00
Link: CVE-2019-16216
JSON object: View
NVD Information
Status : Analyzed
Published: 2019-09-18T12:15:10.990
Modified: 2019-09-18T18:43:07.133
Link: CVE-2019-16216
JSON object: View
Redhat Information
No data.
CWE