#VU41121 Improper Authentication in Crowd Server - CVE-2017-18106
Published: March 29, 2019 / Updated: August 9, 2020
Vulnerability identifier: #VU41121
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2017-18106
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Crowd Server
Crowd Server
Software vendor:
Atlassian
Atlassian
Description
The vulnerability allows a remote authenticated user to execute arbitrary code.
The identifier_hash for a session token in Atlassian Crowd before version 2.9.1 could potentially collide with an identifier_hash for another user or a user in a different directory, this allows remote attackers who can authenticate to Crowd or an application using Crowd for authentication to gain access to another user's session provided they can make their identifier hash collide with another user's session identifier hash.
Remediation
Install update from vendor's website.