CVE-2017-16858 Auth bypass in Crowd
Attackers can impersonate users across directories in Atlassian Crowd by exploiting authentication flaws in the crowd-application plugin, requiring specific directory bindings.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-16858?
CVE-2017-16858 is a medium-severity authentication bypass vulnerability in Atlassian Crowd, published on 31 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2017-16858?
It affects 1 product.
Products include Atlassian Crowd.
How do I fix CVE-2017-16858?
No fix has been published for CVE-2017-16858 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2017-16858 being exploited?
There is no known exploitation of CVE-2017-16858 in the wild and no public exploit code.
Other vulnerabilities in Atlassian Crowd
Sources
Also known as GHSA-p3gx-g437-gw6c.