SB2019032909 - Improper Authentication in Atlassian Crowd
Published: March 29, 2019 Updated: August 9, 2020
Security Bulletin ID
SB2019032909
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Authentication (CVE-ID: CVE-2017-18106)
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.