CVE-2022-43572 Indexing blockage via malformed data sent through S2S or HEC protocols in Splunk Enterprise
Attackers can cause indexing blockage and denial of service in Splunk Enterprise by sending malformed data via S2S or HEC protocols.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-43572?
CVE-2022-43572 is a high-severity denial of service vulnerability in Splunk Splunk, published on 4 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Splunk Enterprise versions below 8.2.9, 8.1.12, and 9.0.2, sending a malformed file through the Splunk-to-Splunk (S2S) or HTTP Event Collector (HEC) protocols to an indexer results in a blockage or denial-of-service preventing further indexing.
Which versions are affected by CVE-2022-43572?
It affects 2 products.
Products include Splunk Splunk, Splunk Splunk Cloud Platform.
How do I fix CVE-2022-43572?
No fix has been published for CVE-2022-43572 yet. Limit exposure of the affected software until one is available.
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-2022-43572 being exploited?
There is no known exploitation of CVE-2022-43572 in the wild and no public exploit code.
Other vulnerabilities in Splunk Splunk
- CVE-2026-20253 Splunk Enterprise Missing Authentication for Critical Function
- CVE-2026-76268 Missing Authentication for Critical Function in the Patroni REST API in Splunk Enterprise
- CVE-2026-76284 Improper Neutralization in Splunk Enterprise
- CVE-2026-76285 Improper Adherence to Coding Standards in Splunk Enterprise
- CVE-2017-17067 Auth bypass in n/a
Sources
Also known as GHSA-9x3h-hpx6-h3hp.