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7.5 High Exploited

CVE-2023-44487 HTTP/2 Rapid Reset Attack Vulnerability

Active exploitation observed

· CISA KEV catalogue
Required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Ransomware campaigns Not observed so far
Weakness CWE-400

Description

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

Affected products and versions

Product Affected versions Fixed in
n/a Versions not published
http 2.0 No fix stated
RUGGEDCOM APE1808 Versions not published
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated
SINEC NMS 3.0 earliest → < 3.0 3.0
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated

References

Timeline

  1. Published
  2. Added to the KEV catalogue
  3. Last modified

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