CVE intelligence and bounded remediation

CVE-2021-20016 — SonicWall SSLVPN SMA100 SQL Injection Vulnerability

Critical CVSS 9.8 CISA KEV

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information. This vulnerability impacts SMA100 build version 10.x.

Severity
Critical
CVSS
9.8 (3.1)
Published
2021-02-04
CISA KEV
Known exploited
Ecosystem
software/application
Weaknesses
CWE-89

Affected products

  • sonicwall / sma_100_firmware
  • sonicwall / sma_200_firmware
  • sonicwall / sma_210_firmware
  • sonicwall / sma_400_firmware
  • sonicwall / sma_410_firmware
  • sonicwall / sma_500v

Matched remediation archetype

SQL and data-query injection

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Check exposure

  • Trace request, message, file, and stored values into SQL, ORM query fragments, filters, sort expressions, and other data-query languages.
  • Inventory database roles, reachable schemas, multi-tenant boundaries, and whether stacked or administrative operations are enabled.
  • Check both direct queries and second-order use of previously stored values.

Remediate safely

  • Use parameterized queries or safe query builders for all values; map identifiers and operators through explicit allowlists.
  • Remove raw query concatenation and give the application account only the tables and operations it requires.
  • Update affected data-access components and add regression tests for query structure preservation with inert edge-case inputs.

Authoritative sources

Complete CVE record and remediation plan

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