CVE intelligence and bounded remediation

CVE-2019-13921 — A vulnerability has been identified in SIMATIC WinAC RTX (F) 2010 (All versions < SP3 Update 1)

High CVSS 7.5

A vulnerability has been identified in SIMATIC WinAC RTX (F) 2010 (All versions < SP3 Update 1). Affected versions of the software contain a vulnerability that could allow an unauthenticated attacker to trigger a denial-of-service condition. The vulnerability can be triggered if a large HTTP request is sent to the executing service. The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise availability of the service provided by the software.

Severity
High
CVSS
7.5 (3.1)
Published
2019-10-10
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-410, CWE-400

Affected products

  • siemens / simatic_winac_rtx_(f)_2010
  • siemens / simatic_winac_rtx_(f)_2010 / sp1
  • siemens / simatic_winac_rtx_(f)_2010 / sp2

Showing 3 representative product identities from 11 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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