TCP Evasion Vulnerability in Suricata by Open Information Security Foundation
CVE-2021-37592

9.8CRITICAL

Key Information:

Vendor

Oisf

Status
Suricata
Vendor
CVE Published:
19 November 2021

What is CVE-2021-37592?

Suricata versions prior to 5.0.8 and those in the 6.x series before 6.0.4 exhibit a vulnerability that permits TCP evasion. This issue arises when a client uses a specially crafted TCP/IP stack capable of transmitting a specific sequence of segments. Attackers might exploit this vulnerability to bypass security mechanisms, posing significant risks to network integrity and security.

References

https://github.com/OISF/suricata/releases
x_refsource_MISC
https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-rele...
x_refsource_CONFIRM
https://redmine.openinfosecfoundation.org/issues/4569
x_refsource_CONFIRM

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.