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Linux.Kernel.TCP.SACK.Panic.DoS

description-logoDescription

This indicates an attack attempt to exploit a Denial of Service vulnerability in Linux kernel.
The vulnerability is due to an error in Linux kernel when it handles TCP packets with low MSS size. A remote attacker may be able to exploit this to cause a denial of service condition on the affected system.

description-logoOutbreak Alert

View the full Outbreak Alert Report

affected-products-logoAffected Products

Linux kernel 4.15 and below

Impact logoImpact

Denial of Service: Remote attackers can crash vulnerable systems.

recomended-action-logoRecommended Actions

Apply the most recent upgrade or patch from the vendor:
https://access.redhat.com/security/cve/cve-2019-11477
https://access.redhat.com/security/cve/cve-2019-11478
https://access.redhat.com/security/cve/cve-2019-11479

Coverage

IPS (Regular DB)
IPS (Extended DB)

Version Updates

Date Version Detail
2021-03-23 18.044 Severity:critical:high
2019-11-26 15.731 Default_action:pass:drop
2019-06-27 14.640 Sig Added
2019-06-21 14.637

References

https://access.redhat.com/security/vulnerabilities/tcpsack
ID 48103
Created Jun 21, 2019
Updated Mar 23, 2021
Outbreak Alert 2022 Annual Report
Risk black-background-circle-icon black-background-circle-icon black-background-circle-icon black-background-circle-icon lightgray-background-circle-icon
CVE ID CVE-2019-11479 CVE-2019-11478 CVE-2019-11477
Exploit Prediction Score 97.4%
Default Action drop
Active
Affected OS Linux
Affected App Other