Buffer Overflow Vulnerability in SonicOS by SonicWall
CVE-2021-20027

7.5HIGH

Key Information:

Vendor

Sonicwall
Status
Sonicos
Vendor
CVE Published:
14 June 2021

What is CVE-2021-20027?

A buffer overflow vulnerability in SonicOS permits remote attackers to execute a Denial of Service (DoS) attack by sending specifically crafted requests. This issue affects various SonicOS platforms, including Gen5, Gen6, Gen7, as well as the SonicOSv virtual firewalls, posing a significant risk to network availability.

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Affected Version(s)

SonicOS SonicOS 5.9.1.13 and earlier

SonicOS SonicOSv 6.5.4.4 and earlier

SonicOS SonicOS 6.0.5.3 and earlier

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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