CVE-2021-33670 Denial of service in SAP NetWeaver AS for Java (Http Service)

What is CVE-2021-33670?

CVE-2021-33670 is a high-severity denial of service vulnerability in Sap Netweaver Application Server Java, published on 14 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

SAP NetWeaver AS for Java (Http Service Monitoring Filter), versions - 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, allows an attacker to send multiple HTTP requests with different method types thereby crashing the filter and making the HTTP server unavailable to other legitimate users leading to denial of service vulnerability.

Which versions are affected by CVE-2021-33670?

It affects 1 product.

Products include Sap Netweaver Application Server Java.

How do I fix CVE-2021-33670?

No fix has been published for CVE-2021-33670 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-2021-33670 being exploited?

There is no known exploitation of CVE-2021-33670 in the wild and no public exploit code.

Other vulnerabilities in Sap Netweaver Application Server Java

• CVE-2020-6287 SAP NetWeaver Missing Authentication for Critical Function Exploited Critical 10.0
• CVE-2010-5326 SAP NetWeaver Remote Code Execution Exploited Critical 10.0
• CVE-2016-2386 SAP NetWeaver SQL Injection Exploited Critical 9.8
• CVE-2017-12637 SAP NetWeaver Directory Traversal Exploited High 7.5
• CVE-2016-3976 SAP NetWeaver Directory Traversal Exploited High 7.5

All Sap Netweaver Application Server Java vulnerabilities

Sources

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

Also known as GHSA-cw5h-4qfv-qqr2.