PT-2023-18677 · Zulip · Zulip
Alexmv
·
Publicado
2023-02-07
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Atualizado
2023-02-16
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CVE-2023-22735
CVSS v3.1
4.4
Média
| Vetor | AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
Zulip versions prior to commit
2f6c5a8 but after commit 04cf68bDescription
Zulip is an open-source team collaboration tool. In affected versions, 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. This enables session theft. Only deployments which use the S3 storage are affected, and only deployments which deployed commit 04cf68b45ebb5c03247a0d6453e35ffc175d55da, which has only been in main, not any numbered release.Recommendations
To resolve the issue, users should upgrade from
main again to deploy the fix. As a temporary workaround, 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.Exploit
Correção
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Zulip