Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.5 until 8.0.6, the FTP parser in src/app-layer-ftp.c can continue allocating transactions after app-layer.protocols.ftp.max-tx is reached while processing one large chunk of FTP command data. The oversized transaction list is repeatedly processed with quadratic complexity after the too_many_transactions event, allowing crafted FTP traffic to degrade packet processing, reduce monitoring visibility, or cause denial of service.
This issue is fixed in version 8.0.6.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385
security-advisories@github.com
https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5
security-advisories@github.com
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
security-advisories@github.com
https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9
security-advisories@github.com
https://redmine.openinfosecfoundation.org/issues/8592
security-advisories@github.com