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TI-2021-03356 Aliases CVE-2021-20038GHSA-jmhc-vxg9-h2g4

Stack-based buffer overflow in SonicWall SMA100

Priority CRITICAL 100Exploited in the wildCWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.

Why it matters now

Exploitation Active In CISA KEV since 2022-01-28CISA due date 2022-02-11Known ransomware use
EPSS 0.99912 99th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SonicWallSonicWall SMA100up to 10.2.0.8-37sv; up to 10.2.1.1-19sv; up to 10.2.1.2-24sv—No fix listedCNA
  • SonicWall SMA100 VendorSonicWall Affected up to 10.2.0.8-37sv; up to 10.2.1.1-19sv; up to 10.2.1.2-24sv Fixed in — No fix listed CNA

CPE configurations NVD · 20

CPEVersionsRoleVendor
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*10.2.0.8-37svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*10.2.1.1-19svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*10.2.1.2-24svVulnerableSonicWall
cpe:2.3:h:sonicwall:sma_200:-:*:*:*:*:*:*:*not specified by NVDRunning onSonicWall
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*10.2.0.8-37svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*10.2.1.1-19svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*10.2.1.2-24svVulnerableSonicWall
cpe:2.3:h:sonicwall:sma_210:-:*:*:*:*:*:*:*not specified by NVDRunning onSonicWall
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*10.2.0.8-37svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*10.2.1.1-19svVulnerableSonicWall
  • cpe:2.3:o:sonicwall:sma_200_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* Versions 10.2.0.8-37sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* Versions 10.2.1.1-19sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* Versions 10.2.1.2-24sv Vulnerable ·SonicWall
  • cpe:2.3:h:sonicwall:sma_200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
  • cpe:2.3:o:sonicwall:sma_210_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* Versions 10.2.0.8-37sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* Versions 10.2.1.1-19sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* Versions 10.2.1.2-24sv Vulnerable ·SonicWall
  • cpe:2.3:h:sonicwall:sma_210:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
  • cpe:2.3:o:sonicwall:sma_410_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* Versions 10.2.0.8-37sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* Versions 10.2.1.1-19sv Vulnerable ·SonicWall
Show 10 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*10.2.1.2-24svVulnerableSonicWall
cpe:2.3:h:sonicwall:sma_410:-:*:*:*:*:*:*:*not specified by NVDRunning onSonicWall
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*10.2.0.8-37svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*10.2.1.1-19svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*10.2.1.2-24svVulnerableSonicWall
cpe:2.3:h:sonicwall:sma_400:-:*:*:*:*:*:*:*not specified by NVDRunning onSonicWall
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*10.2.0.8-37svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*10.2.1.1-19svVulnerableSonicWall
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*10.2.1.2-24svVulnerableSonicWall
cpe:2.3:h:sonicwall:sma_500v:-:*:*:*:*:*:*:*not specified by NVDRunning onSonicWall
  • cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* Versions 10.2.1.2-24sv Vulnerable ·SonicWall
  • cpe:2.3:h:sonicwall:sma_410:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
  • cpe:2.3:o:sonicwall:sma_400_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* Versions 10.2.0.8-37sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* Versions 10.2.1.1-19sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* Versions 10.2.1.2-24sv Vulnerable ·SonicWall
  • cpe:2.3:h:sonicwall:sma_400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
  • cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* Versions 10.2.0.8-37sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* Versions 10.2.1.1-19sv Vulnerable ·SonicWall
  • cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* Versions 10.2.1.2-24sv Vulnerable ·SonicWall
  • cpe:2.3:h:sonicwall:sma_500v:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2022-01-28 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-20038
  3. 2026-10-03 Alias added: GHSA-jmhc-vxg9-h2g4

References

Exploit 2

Advisory 1

  • TI-2021-03337 SQL injection in SonicWall SMA100 KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-25716 Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. KEVCVSS 3.1CRITICAL 9.1
  • TI-2023-23752 OS command injection in SonicWall SMA100 KEVCVSS 3.1HIGH 7.2
  • TI-2021-03354 OS command injection in SonicWall SMA100 KEVCVSS 3.1MEDIUM 6.5
  • TI-2021-03357 OS command injection in SonicWall SMA100 CVSS 3.1HIGH 8.8
  • TI-2021-03353 Improper access control in SonicWall SMA100 CVSS 3.1CRITICAL 9.1
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences