1. Home
  2. CVE Database
  3. CVE-2021-20048
HIGH · 8.8

CVE-2021-20048

A Stack-based buffer overflow in the SonicOS SessionID HTTP response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the fir...

Vulnerability Description

A Stack-based buffer overflow in the SonicOS SessionID HTTP 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.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
SonicwallSonicos<= 7.0.1-r1456
SonicwallNsa 2650-
SonicwallNsa 2700-
SonicwallNsa 3650-
SonicwallNsa 3700-
SonicwallNsa 4650-
SonicwallNsa 4700-
SonicwallNsa 5650-
SonicwallNsa 6650-
SonicwallNsa 6700-
SonicwallNsa 9250-
SonicwallNsa 9450-
SonicwallNsa 9650-
SonicwallTz270-
SonicwallTz270W-
SonicwallTz300-
SonicwallTz300P-
SonicwallTz300W-
SonicwallTz350-
SonicwallTz350W-

Related Weaknesses (CWE)

CWE-121CWE-787

References

FAQ

What is CVE-2021-20048?

CVE-2021-20048 is a vulnerability with a CVSS score of 8.8 (HIGH). A Stack-based buffer overflow in the SonicOS SessionID HTTP response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the fir...

How severe is CVE-2021-20048?

CVE-2021-20048 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-20048?

Check the references section above for vendor advisories and patch information. Affected products include: Sonicwall Sonicos, Sonicwall Nsa 2650, Sonicwall Nsa 2700, Sonicwall Nsa 3650, Sonicwall Nsa 3700.