CVE-2018-17194 Apache NiFi Improper Input Validation vulnerability
Attackers can cause cluster nodes to hang and timeout by sending DELETE requests with non-zero Content-Length headers, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-17194?
CVE-2018-17194 is a high-severity denial of service vulnerability in Apache Nifi, published on 19 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
When a client request to a cluster node was replicated to other nodes in the cluster for verification, the Content-Length was forwarded. On a DELETE request, the body was ignored, but if the initial request had a Content-Length value other than 0, the receiving nodes would wait for the body and eventually timeout. Mitigation: The fix to check DELETE requests and overwrite non-zero Content-Length header values was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.
Weakness: CWE-20
Which versions are affected by CVE-2018-17194?
2 open source packages ship an affected version, including org.apache.nifi:nifi-framework-cluster. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.nifi:nifi-framework-cluster Maven | From 1.0.0 | 1.8.0 |
org.apache.nifi:nifi-framework-cluster Maven | From 1.0.0 | 1.8.0 |
Products include Apache Nifi.
How do I fix CVE-2018-17194?
Upgrade org.apache.nifi:nifi-framework-cluster to 1.8.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-17194 being exploited?
There is no known exploitation of CVE-2018-17194 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
- CVE-2017-15697 Apache NiFi XSS issue in context path handling
- CVE-2017-5636 Injection in Apache NiFi
- CVE-2026-68981 Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests
- CVE-2023-36542 Apache NiFi: Potential Code Injection with Properties Referencing Remote Resources
Sources
Also known as GHSA-43fp-vwwg-qgv6.