CVE - CVE-2023-22735

CVE-ID
CVE-2023-22735	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
Zulip is an open-source team collaboration tool. In versions of zulip prior to commit `2f6c5a8` but after commit `04cf68b` users could upload files with arbitrary `Content-Type` which would be served from the Zulip hostname with `Content-Disposition: inline` and no `Content-Security-Policy` header, allowing them to trick other users into executing arbitrary Javascript in the context of the Zulip application. Among other things, this enables session theft. Only deployments which use the S3 storage (not the local-disk storage) are affected, and only deployments which deployed commit 04cf68b45ebb5c03247a0d6453e35ffc175d55da, which has only been in `main`, not any numbered release. Users affected should upgrade from main again to deploy this fix. Switching from S3 storage to the local-disk storage would nominally mitigate this, but is likely more involved than upgrading to the latest `main` which addresses the issue.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://github.com/zulip/zulip/commit/04cf68b45ebb5c03247a0d6453e35ffc175d55da URL:https://github.com/zulip/zulip/commit/04cf68b45ebb5c03247a0d6453e35ffc175d55da MISC:https://github.com/zulip/zulip/commit/2f6c5a883e106aa82a570d3d1f243993284b70f3 URL:https://github.com/zulip/zulip/commit/2f6c5a883e106aa82a570d3d1f243993284b70f3 MISC:https://github.com/zulip/zulip/security/advisories/GHSA-wm83-3764-5wqh URL:https://github.com/zulip/zulip/security/advisories/GHSA-wm83-3764-5wqh MISC:https://zulip.readthedocs.io/en/latest/production/upgrade-or-modify.html#upgrading-from-a-git-repository URL:https://zulip.readthedocs.io/en/latest/production/upgrade-or-modify.html#upgrading-from-a-git-repository
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20230106	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20230106)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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