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CVE-2016-9459

6.1 · MEDIUM

Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are vulnerable to a log pollution vulnerability potentially leading to a local XSS.

Published Mar 28, 2017CWE-209EPSS 1.49%

Overview

CVE-2016-9459 is a medium-severity vulnerability. It was published on March 28, 2017 and has a CVSS 3.0 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are vulnerable to a log pollution vulnerability potentially leading to a local XSS. The download log functionality in the admin screen is delivering the log in JSON format to the end-user. The file was delivered with an attachment disposition forcing the browser to download the document. However, Firefox running on Microsoft Windows would offer the user to open the data in the browser as an HTML document. Thus any injected data in the log would be executed.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/97284GitHubgithub.com/nextcloud/server/commit/94975af6db1551c2d23136c2ea22866a5b416070GitHubgithub.com/owncloud/core/commit/044ee072a647636b1a17c89265c7233b35371335GitHubgithub.com/owncloud/core/commit/b7fa2c5dc945b40bc6ed0a9a0e47c282ebf043e1GitHubgithub.com/owncloud/core/commit/efa35d621dc7ff975468e636a5d1c153511296dcRefhackerone.com/reports/146278Refnextcloud.com/security/advisory/?id=nc-sa-2016-002Refowncloud.org/security/advisory?id=oc-sa-2016-012Refwww.securityfocus.com/bid/97284GitHubgithub.com/nextcloud/server/commit/94975af6db1551c2d23136c2ea22866a5b416070

How CyberStrike helps

Frequently asked questions

What is CVE-2016-9459?

CVE-2016-9459 is a medium-severity vulnerability. It was published on March 28, 2017 and has a CVSS 3.0 base score of 6.1 (MEDIUM).

How severe is CVE-2016-9459?

This vulnerability has a CVSS 3.0 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-9459?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-9459?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-9459 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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