Stack-Based Buffer Overflow in SonicWall's SonicOS Firmware
CVE-2021-20048

8.8HIGH

Key Information:

Vendor

Sonicwall
Status
Sonicos
Vendor
CVE Published:
10 January 2022

What is CVE-2021-20048?

A stack-based buffer overflow vulnerability exists in the SonicOS SessionID HTTP response header, which can be exploited by a remote authenticated attacker. This flaw may lead to Denial of Service (DoS), allowing attackers to disrupt the functionality of the firewall. Additionally, there is a potential risk of unauthorized code execution. The vulnerability affects SonicOS firmware versions across Gen 5, Gen 6, and Gen 7, highlighting the critical need for timely updates and security measures.

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Affected Version(s)

SonicOS 7.0.1-R146 and earlier

SonicOS 7.0.1-5023-1349 and earlier

SonicOS 7.0.1-5018-R1715 and earlier

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-202...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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