Sonatype Security Advisory
Vulnerability Identifier: CVE-2018-12100
Date: June 4th, 2018
Affected Versions: All previous Nexus Repository 3 OSS/Pro versions up to and including 3.11.0-01.
Fixed in Version: Nexus Repository OSS/Pro version 3.12.0-01
Risk: Medium - 4.8 (CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N)
Multiple Cross-Site Scripting (XSS) vulnerabilities have been discovered in Nexus Repository 3.
These vulnerabilities were identified by external researchers and internal employees and have been verified by our security team. We are not aware of any active exploits taking advantage of this issue. However, we strongly encourage all users of Nexus Repository to immediately take the steps outlined in this advisory.
Publicly available Nexus Repository instances are at greater risk and we have taken steps to mitigate this vulnerability in known public forge instances as well as providing remediation guidance to the overall Nexus Repository user community.
The vulnerability associated with this advisory is fixed in Nexus Repository 3.12.0-01 and above. The latest version of Nexus Repository 3 can be downloaded from:
Sonatype thanks Jesper den Boer for responsibly reporting the identified issues and working with us as we addressed them.
If you encounter any problems or have any questions/concerns, please contact us by filing a ticket at https://support.sonatype.com.
Frequently Asked Questions:
Q: What is the risk associated with this vulnerability?
Q: What preconditions must be met in order to be vulnerable?
A: In most cases, an attacker must have network access to the Repository Manager instance. However, there is one instance where an unauthenticated remote attacker can exploit the vulnerability.
Q: Are there implications associated with this advisory itself?
A: Disclosure unfortunately means bad actors may try to take advantage. While we have initially limited the information to the minimum details necessary for users to affect a proper fix, this merely slows down a would-be attacker. As such, we are advising all organizations utilizing Nexus Repository to immediately assess their individual impact and take appropriate action in response.
Q: Where can I obtain more information associated with the vulnerability?
A: At this time, and in the interest of best protecting our user community, we are limiting the information released to what absolutely required in order to assess impact and affect remediation. Please contact support for more information.
Q: Why is Sonatype making this information available?
A: This is part of a responsible disclosure process. Given Nexus Repository is an open-source project with over 150,000 active server installations, notifying the user base will invariably lead to broad dissemination. We are taking a concerted and proactive approach in our outreach activities and in an effort to achieve the most rapid remediation possible.