CVE intelligence and bounded remediation

CVE-2021-33670 — Sap Netweaver Application Server Java security vulnerability

High CVSS 7.5

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.

Severity
High
CVSS
7.5 (3.1)
Published
2021-07-14
CISA KEV
Not currently listed
Ecosystem
java/maven

Affected products

  • sap / netweaver_application_server_java / 7.10
  • sap / netweaver_application_server_java / 7.11
  • sap / netweaver_application_server_java / 7.20
  • sap / netweaver_application_server_java / 7.30
  • sap / netweaver_application_server_java / 7.31
  • sap / netweaver_application_server_java / 7.40

Showing 6 representative product identities from 7 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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