Suricata ftp: crafted FTP traffic can cause quadratic CPU consumption
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
exploitation probability
0.4%top 70% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
OISF · suricataReferences
https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5https://github.com/OISF/suricata/releases/tag/suricata-8.0.6https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9https://redmine.openinfosecfoundation.org/issues/8592