Atlassian Crowd up to 3.1.1 crowd-application improper authentication

Summaryinfo

A vulnerability was found in Atlassian Crowd up to 3.1.1. It has been rated as critical. The affected element is an unknown function of the component crowd-application. The manipulation leads to improper authentication. This vulnerability is traded as CVE-2017-16858. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Atlassian Crowd up to 3.1.1. It has been rated as critical. This issue affects an unknown function of the component crowd-application. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The 'crowd-application' plugin module (notably used by the Google Apps plugin) in Atlassian Crowd from version 1.5.0 before version 3.1.2 allowed an attacker to impersonate a Crowd user in REST requests by being able to authenticate to a directory bound to an application using the feature. Given the following situation: the Crowd application is bound to directory 1 and has a user called admin and the Google Apps application is bound to directory 2, which also has a user called admin, it was possible to authenticate REST requests using the credentials of the user coming from directory 2 and impersonate the user from directory 1.

The bug was discovered 12/12/2017. The weakness was shared 01/31/2018 (Website). It is possible to read the advisory at jira.atlassian.com. The identification of this vulnerability is CVE-2017-16858 since 11/16/2017. The attack may be initiated remotely. The successful exploitation requires a simple authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 50 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 3.1.2 eliminates this vulnerability.

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Productinfo

Vendor

• Atlassian

Name

• Crowd

Version

• 3.1.0
• 3.1.1

License

• free

Website

• Vendor: https://www.atlassian.com/

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CPE 2.2info

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