CVE intelligence and bounded remediation

CVE-2023-20221 — Cisco Video Phone 8875 Firmware security vulnerability

Medium CVSS 6.5

A vulnerability in the web-based management interface of Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack against a user of the web-based management interface of an affected system. This vulnerability is due to insufficient CSRF protections for the web-based management interface of an affected device. An attacker could exploit this vulnerability by persuading an authenticated user of the interface to follow a crafted link. A successful exploit could allow the attacker to perform a factory reset of the affected device, resulting in a Denial of Service (DoS) condition.

Severity
Medium
CVSS
6.5 (3.1)
Published
2023-08-16
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-352

Affected products

  • cisco / video_phone_8875_firmware
  • cisco / ip_phone_6821_with_multiplatform_firmware / 11-3-1mppsr4upg
  • cisco / ip_phone_6821_with_multiplatform_firmware / 11-3-1msr2upg
  • cisco / ip_phone_6821_with_multiplatform_firmware / 11.0.0
  • cisco / ip_phone_6821_with_multiplatform_firmware / 11.0.1
  • cisco / ip_phone_6821_with_multiplatform_firmware / 11.0.1_msr1-1

Showing 6 representative product identities from 683 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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