Summaryinfo

A vulnerability, which was classified as critical, has been found in Zulip up to 5.4. Affected by this vulnerability is an unknown functionality of the component API Call Handler. This manipulation causes improper authorization. The identification of this vulnerability is CVE-2022-31168. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Detailsinfo

A vulnerability was found in Zulip up to 5.4. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component API Call Handler. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Zulip is an open source team chat tool. Due to an incorrect authorization check in Zulip Server 5.4 and earlier, a member of an organization could craft an API call that grants organization administrator privileges to one of their bots. The vulnerability is fixed in Zulip Server 5.5. Members who don’t own any bots, and lack permission to create them, can’t exploit the vulnerability. As a workaround for the vulnerability, an organization administrator can restrict the `Who can create bots` permission to administrators only, and change the ownership of existing bots.

The weakness was shared 07/22/2022 as GHSA-c3cp-ggg5-9xw5. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2022-31168 since 05/18/2022. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 5.5 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 751b2a03e565e9eb02ffe923b7c24ac73d604034 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Zulip

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4

License

• open-source

Website

• Product: https://github.com/zulip/zulip/

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