CVE-2017-12623 XML External Entity Reference in Apache NiFi

What is CVE-2017-12623?

CVE-2017-12623 is a medium-severity vulnerability in Apache Nifi, published on 10 Oct 2017. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An authorized user could upload a template which contained malicious code and accessed sensitive files via an XML External Entity (XXE) attack. The fix to properly handle XML External Entities was applied on the Apache NiFi 1.4.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Weakness: CWE-611

Which versions are affected by CVE-2017-12623?

2 open source packages ship an affected version, including org.apache.nifi:nifi. It affects 1 product.

Products include Apache Nifi.

How do I fix CVE-2017-12623?

Upgrade org.apache.nifi:nifi to 1.4.0 or later.

Is CVE-2017-12623 being exploited?

There is no known exploitation of CVE-2017-12623 in the wild and no public exploit code.

Other vulnerabilities in Apache Nifi

• CVE-2018-1309 Improper Restriction of XML External Entity Reference in Apache NiFi Critical 9.8
• CVE-2017-15697 Apache NiFi XSS issue in context path handling Critical 9.8
• CVE-2017-5636 Injection in Apache NiFi Critical 9.8
• CVE-2026-68981 Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests High 8.8
• CVE-2023-36542 Apache NiFi: Potential Code Injection with Properties Referencing Remote Resources High 8.8

All Apache Nifi vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-qj7f-j6h9-g5rq.