CVE-2016-3093 Denial of service in Apache Struts
Remote attackers can cause a denial of service by blocking web site access due to improper method reference caching in Apache Struts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-3093?
CVE-2016-3093 is a medium-severity denial of service vulnerability in Apache Struts, published on 7 Jun 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Apache Struts 2.0.0 through 2.3.24.1 does not properly cache method references when used with OGNL before 3.0.12, which allows remote attackers to cause a denial of service (block access to a web site) via unspecified vectors.
Weakness: CWE-20
Which versions are affected by CVE-2016-3093?
4 open source packages ship an affected version, including org.apache.struts:struts2-core and ognl:ognl. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.struts:struts2-core Maven | From 2.0.0 | 2.3.24.3 |
org.apache.struts:struts2-core Maven | From 2.0.0 | 2.3.24.3 |
ognl:ognl Maven | All versions | 3.0.12 |
ognl:ognl Maven | All versions | 3.0.12 |
Products include Apache Struts, Ognl Project Ognl.
How do I fix CVE-2016-3093?
Upgrade org.apache.struts:struts2-core to 2.3.24.3 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-2016-3093 being exploited?
There is no known exploitation of CVE-2016-3093 in the wild and no public exploit code.
Other vulnerabilities in Apache Struts
Sources
Also known as GHSA-383p-xqxx-rrmp, RHLW-2026-ecc1d237bc4cba0c.