CVE intelligence and bounded remediation

CVE-2021-22320 — There is a denial of service vulnerability in Huawei products

High CVSS 7.5

There is a denial of service vulnerability in Huawei products. A module cannot deal with specific messages correctly. Attackers can exploit this vulnerability by sending malicious messages to an affected module. This can lead to denial of service. Affected product include some versions of IPS Module, NGFW Module, NIP6600, NIP6800, Secospace USG6300, Secospace USG6500 and Secospace USG6600.

Severity
High
CVSS
7.5 (3.1)
Published
2021-03-22
CISA KEV
Not currently listed
Ecosystem
operating-system

Affected products

  • huawei / ips_module_firmware / v500r005c00spc100
  • huawei / ips_module_firmware / v500r005c00spc200
  • huawei / ips_module_firmware / v500r005c20spc300
  • huawei / ngfw_module_firmware / v500r005c00spc100
  • huawei / ngfw_module_firmware / v500r005c00spc200
  • huawei / ngfw_module_firmware / v500r005c20spc300

Showing 6 representative product identities from 39 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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