high
8.8
CWE
787 121 119
Advisory Published
Updated

CVE-2021-20046: Buffer Overflow

First published: Fri Jan 07 2022(Updated: )

A Stack-based buffer overflow in the SonicOS HTTP Content-Length response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the firewall. This vulnerability affected SonicOS Gen 5, Gen 6 and Gen 7 firmware versions.

Credit: PSIRT@sonicwall.com

Affected SoftwareAffected VersionHow to fix
SonicWall SonicOS<=7.0.1-r146
SonicWall NSA 2650
SonicWall NSA 2700
SonicWall NSA 3650 Firmware
SonicWall NSA 3700 Firmware
SonicWall NSA 4650 Firmware
SonicWall NSA 4700
SonicWall NSA 5650
SonicWall NSA 6650
SonicWall NSA 6700 Firmware
SonicWall NSA 9250
SonicWall NSA 9450
SonicWall NSA 9650
SonicWall TZ270
SonicWall TZ270W Firmware
SonicWall TZ300 Firmware
SonicWall TZ300P Firmware
SonicWall TZ300W Firmware
SonicWall TZ350 Firmware
SonicWall TZ350W Firmware
SonicWall TZ370
SonicWall TZ370W Firmware
SonicWall TZ400W Firmware
SonicWall TZ400W Firmware
SonicWall TZ470 Firmware
SonicWall TZ470W Firmware
SonicWall TZ500W
SonicWall TZ500W Firmware
SonicWall TZ570 Firmware
SonicWall TZ570P Firmware
SonicWall TZ570W Firmware
SonicWall TZ600
SonicWall TZ 600P
SonicWall TZ670 Firmware
SonicWall SonicOS<=7.0.1-5023-1349
SonicWall NSV 10 Firmware
SonicWall NSV 100 Firmware
SonicWall NSV 1600
SonicWall NSv
SonicWall NSv 25
SonicWall NSV 270
SonicWall NSV 300
SonicWall NSV 400 Firmware
SonicWall NSV 470 Firmware
SonicWall NSV 50 Firmware
SonicWall NSV800
SonicWall NSv 870
SonicWall SonicOS<=7.0.1-5018-r1715
SonicWall NSSP 12400 Firmware
SonicWall NSSP 12800 Firmware
SonicWall NSSP 13700
SonicWall NSSP 15700
SonicWall SonicOS<=6.5.4.8-89n
SonicWall SOHO 250W Firmware
SonicWall SuperMassive 9200
SonicWall SuperMassive 9400
SonicWall SuperMassive 9600
SonicWall SuperMassive 9800
SonicWall SonicOS<=6.5.1.13-1n
SonicWall SonicOS<=6.0.5.3-94o
SonicWall SuperMassive E10200
SonicWall SuperMassive E10400
SonicWall SuperMassive E10800
SonicWall SonicOS>=5.0.0.0<=5.9.1.13
SonicWall SOHO 250W

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-20046?

    CVE-2021-20046 is a stack-based buffer overflow vulnerability in the SonicOS HTTP Content-Length response header.

  • How does CVE-2021-20046 affect SonicOS firmware versions?

    CVE-2021-20046 affects SonicOS Gen 5, Gen 6, and Gen 7 firmware versions.

  • What is the severity of CVE-2021-20046?

    CVE-2021-20046 has a severity rating of 8.8 (high).

  • How can CVE-2021-20046 be exploited?

    CVE-2021-20046 can be exploited by a remote authenticated attacker to cause denial of service (DoS) and potentially execute code in the firewall.

  • Where can I find more information about CVE-2021-20046?

    You can find more information about CVE-2021-20046 at the following link: [SonicWall PSIRT](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0027)

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