CVE-2016-6798

Description

In the XSS Protection API module before 1.0.12 in Apache Sling, the method XSS.getValidXML() uses an insecure SAX parser to validate the input string, which allows for XXE attacks in all scripts which use this method to validate user input, potentially allowing an attacker to read sensitive data on the filesystem, perform same-site-request-forgery (SSRF), port-scanning behind the firewall or DoS the application.

References

Link	Tags
https://lists.apache.org/thread.html/b72c3a511592ec70729b3ec2d29302b6ce87bbeab62d4745617a6bd0%40%3Cdev.sling.apache.org%3E
http://www.securityfocus.com/bid/99873	vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2016-6798?: CVE-2016-6798 has been scored as a critical severity vulnerability.
How to fix CVE-2016-6798?: To fix CVE-2016-6798, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-6798 being actively exploited in the wild?: It is possible that CVE-2016-6798 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2016-6798?: CVE-2016-6798 affects Apache Software Foundation Apache Sling.

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Description

Category

CWE-611 – Improper Restriction of XML External Entity Reference

References

Frequently Asked Questions